Pros: Mâcon to Saint-Étienne, 200km, Hilly

Me: Thomas de Gendt Intervals

Barnstorming ride by Thomas de Gendt last night, kicking off a breakaway with De Marchi, Terpstra and King and then gradually dropping them all before holding off a chasing peloton for the win. De Gendt doing what he does best.

Another day with lots of climbs, 7 in total, which meant lots of intervals again. I normally based my efforts off Mike Woods, but he hadn’t uploaded to Strava so I chose to base off De Gendt’s file instead. I opted for the same effort, but half the duration of each of the seven climbs.

9:30 @ 92%

6:20 @ 95%

8:10 @ 100%

6:15 @ 86%

6:20 @ 100%

5:50 @ 95%

2:20 @ 115%

Definitely not fit enough to attempt the full duration of his efforts yet! Ride went well, legs weren’t too bad though my right knee was getting tight towards the end of the ride. Need to do some more stretching.

That’s the worst two stages out of the way, six and eight. There are hard stages later in the Tour, but not 7 intervals in the one stage. Two more days to go to a rest day. Looking forward to it now!

Me: 53.2km, 1h 33mm, 1061 calories, 127 TSS.

Pro: 204.5km, 5h 16m, 5879 calories, 386 TSS.

Weight: 92.2kg - CTL: 41.7 - TSB: -15.8

Pros: Belfort to Chalon-sur-Saône, 230km, Flat

Me: 77km, 5m SST

Quite sore legs this morning, though HRV was back to normal. Lunch didn’t agree with me and it was pretty gusty out so kept putting off going for a ride. Supposed to be 3hrs cruise, but couldn’t be arsed today so eventually opted for an hour on the indoor trainer with a sprint finish.

Me: 33km, 56m, 557 calories, 44 TSS.

Pro: 239.2km, 6h 27m, 3488 calories, 169 TSS.

Weight: 92.1kg - CTL: 38.9 - TSB: -14.6

Nature has an article pointing out that time is running out for sand - demand is increasing beyond available supply and there’s very little monitoring or oversight into what is the world’s most extracted resource. As you’d expect, extraction is vastly outpacing the natural processes which create sand.

Desert sand grains are too smooth to be useful, and most of the angular sand that is suitable for industry comes from rivers (less than 1% of the world’s land). This extraction of sand and gravel has far-reaching impacts on ecology, infrastructure and the livelihoods of the 3 billion people who live along rivers. For example, sand mining on the Pearl River (Zhujiang) in China has lowered water tables, made it harder to extract drinking water and hastened river-bed scour, damaging bridges and embankments.

This is the earliest warning of a potential problem and the article goes on to recommend a number of steps to deal with the situation, starting with improved monitoring to get an accurate assessment of the sand trade, both legal and illegal.

Pretty interesting website allowing you to enter a country and see its temperature record as blue to red colour stripes since 1901. #globalwarming

Here’s Australia.

Incidentally, the data they are using is from Berkeley Earth, which is the group founded, with funding from the Koch brothers, by a bunch of people who thought the temperature record data was being fudged… until they got together to analyse the raw data themselves and concluded that they were wrong and it wasn’t being fudged at all :)

Pros: Mulhouse to La Planche des Belles Filles, 160.5km, Mountains

Me: 53.5km, 15m @ 75%, 5m, 10m, 15m & 5m @ 80%, 10m & 15m @ 95%, 30s hard finish.

Non stop intervals today. Based on yesterday’s intervals I worked out that just riding to the park, doing the intervals and riding straight home would put me over today’s required distance, so I opted to do them on the indoor trainer instead. At least then I could program in the required intervals on TrainerRoad and watch the stage replay, rather than having to pay constant attention to my Garmin if I was outside.

Unfortunately SBS On Demand have been a bit slow putting the stage replays online and I was stuck with the highlights which finished after an hour, l having me to rewatch the Stage 5 highlights to finish the ride.

A breakaway went early, so the peloton got a reasonably cruisey ride until the last two climbs when things heated up. Same for me, with the early intervals at 80% and the final two at 95%. The last one stung and I pulled the pin with about 3 minutes to go, bringing forward the short sprint to mimic the 24% gradient the pros were finishing on! Could have finished it if I was fresh, but legs are starting to complain at harder efforts.

Saturday tomorrow - no 6am conference calls. Looking forward to a lie-in 😄

Me: 68.2km, 2h 5m, 1253 calories, 114 TSS.

Pro: 178.7km, 5h 9m, 3148 calories, 263 TSS.

Weight: 92.1kg - CTL: 38.7 - TSB: -9.7

Pros: Saint-Dié-des-Vosges to Colmar, 175.5km, Hilly

Me: 56.8km PZ1, 5m @ 225W, 10m @ 225W, 10m @ 250W, 5m @ 250W

The first of a few days with a bunch of efforts thrown in. To guage how hard I should go for the intervals, I opted to check out Mike Woods’ Strava file to see how hard he had to ride the climbs on last night’s stage - 85%, 85%, 93% and 93% as it turned out - and that’s the target I set for myself. This approach might come back to bite me in the arse tomorrow as there’s a mountain-top finish and the GC riders will be going for it! Fingers crossed!

The ride it self was OK. Intervals weren’t too bad, though 250W was a decent effort. Part of the annoying thing about being unfit is comparisons to your fit self. Last March (2018) I knocked out an hour at 280W with the same heart rate as I now get for 10 minutes at 250. Legs felt OK, though I can feel the tiredness starting to accumulate. I’ve ridden a bit over 10 hours in the last 5 days, which in itself isn’t a massive amount. It’s only when you compare it to the 82 hours I’d ridden in the whole of 2019 prior to starting 3DF that you see the problem 😄 One thing I definitely notice is that despite a decent nights’ sleep, my heart rate is elevated all night and my HRV is quite low, both signs of fatigue.

Tomorrow is a brutal stage - non stop intervals for me. Will see what shape I’m in after that!

Me: 53.9km, 2h 9m, 1166 calories, 112 TSS.

Pro: 178.8km, 4h 16m, 3148 calories, 193 TSS.

Weight: 91.7kg - CTL: 36.9 - TSB: -4.2

Pros: Reims to Nancy, 213.5km, Flat

Me: 71.1km PZ1

Another long day today, though no intervals this time. Legs felt OK, though guts didn’t feel great even before I started. Ended up a few km short as a result, opting to skip random riding to make up the shortfall. Still, at 2h45, that’s 50% of the pros 5h25, so I’ll count it.

Me: 68.1km, 2h 45m, 1395 calories, 112 TSS.

Pro: 200km, 5h 25m, 2959 calories, 151 TSS.

Weight: 91.8kg - CTL: 35.1 - TSB: 2.0

Pros: Binche to Épernay, 215km, Hilly

Me: 72km PZ1, 3x5m SST

Nothing exciting. Long hilly day for the pros, long ride for me too. Pace was fine, though the intervals at the end felt harder than they should have. Heart rate was definitely higher, so whether I was doing them too hard, or it was due to a bit of dehydration or fatigue, I’m not sure. I think I’ll do them at the start of the ride in future so I can get a better idea.

One thought that crossed my mind while out on the road was that I’ve been aiming to do one third the distance of the pros, but I figured it would be interesting to compare how that actually translates into work done. I follow Mike Woods on Strava, who rides for EF Education First and finished with the main bunch last night. He publishes his power data unlike a lot of the pros and here’s his ride from yesterday…

The stage took him 4h54, burning 3,400 calories and a training stress score of 206. My ride took me 2h55, burning 1500 calories with a training stress score of 139, so it appears that while I’m only doing one third of the distance I’m getting two thirds of the training stress. This is going to hurt!

Weight: 93.3kg - CTL: 32.8 - TSB: 12.4

Pros: Bruxelles Palais Royal to Brussel Atomium, 27.6km, Team Time Trial

Me: 5 x (2:30 @ 90%, :30 @ 110%)

A Team Time Trial is basically the whole team riding in single file, with the guy on the front doing lots of work and the rest sheltering behind in his draft. The guy on the front rotates off after a set interval and rejoins the line at the back, and so it goes with each team member rotating through to the front position multiple times until the finish line.

Given there’s only me in this lark, to mimic the pros’ efforts I opted for 30 seconds at 110% of threshold to simulate the time on the front, then 90% of threshold to simulate the “rest” portion, repeated five times for a total of 15 minutes. Jumbo-Visma won the stage in 28:57 (avg. 57.2 kmh!) so 15 minutes is reasonable for me.

Woke up feeling a bit sluggish this morning, despite not staying up to watch the stage last night. HRV (Heart Rate Variability) was low too, which can be an indicator of tiredness or oncoming illness, so macro-dosed some Vitamin C just in case (yeah, placebo :-)

Session went OK - no issues, though looking at my heart rate compared to the pros, I probably should have set the efforts a bit harder.

Weight: 92.8kg CTL: 30.3

Pros: Bruxelles to Brussel, 194.5km, Flat

Me: 65km Z1, 5m SST

A bit of a cockup yesterday watching the rain radar! I could see a bunch of rain on the way so kept postponing going out. Turns out the rain was moving much slower that I realised and by the time I figured that out there wasn’t enough time to go out before the rain and also not enough time to go out after the rain and before nightfall. So, onto the indoor trainer 😕

With no distance measured on the trainer I had to adjust the plan. The actual stage took 4:20 for the pros, so a third of that was 1:25 or so, and 65km on flat roads would take me about 2:00 so I opted to split the difference and ride 1:45 while watching a repeat of last night’s stage.

All went well, if still a bit boring. I don’t really ride that much on the trainer, so it still is a harder workout than the equivalent on the road - no traffic lights, no downhills, just constant pedalling - and I was pretty tired later in the evening. Early to bed!

Weight: 93.5kg CTL: 30.1

Third de France is underway, as is the longer term Fat Bastard Project 😆

It’s that time of the year again - Le Tour de France starts tonight!

Rather than my usual winter of sitting on the couch watching the race and getting fat, this year I’ve done all the fat building in advance and will instead do what I first thought of last year - ride my own Third de France, so called because I’ll aim to ride a third of what the pros do.

Very simplified, if you are trying to win Le Tour, it’s essentially a very long ride punctuated with some hard efforts up the mountains and in time trials. Outside of those efforts the aim is to do as little work as possible, so that’s the aim of my stages as well.

The goal each day will be to ride around in Zone 1 (polarised model - mentioned earlier) and to do some harder, sub-threshold efforts when the riders hit the mountains.

The mountains are classified from the easiest 4, to the hardest, HC (Hors Categorie = Beyond Category) and, since a big HC climb could take up to an hour for the pros, I’ll do a 20min SST effort for a HC climb and knock off five minutes for each level below. I’ll ignore Cat 4 climbs as they’re just pimples. I’ll also do all the SST intervals back-to-back, taking five minutes active rest between each, rather than spacing them out as the mountains are. Once all the intervals are done, I’ll continue riding Z1 until I rack up the required distance for the day.

For the team time-trial stage I’ll do OverUnders, and for the individual time-trial stage I’ll do an FTP effort.

I’ll also ride my stage the day after the pros do, giving me the option to watch the stage if I choose to ride on the indoor trainer, so technically I start tomorrow.

Bearing that in mind, how does my Tour look like?

Here’s a quick summary of the plan:

Stages 6 & 8 stand out in the first week, with 18, 19 and 20 going to be a hard finish. Stages 14 & 15 will be problematic for me as I’ll be away that weekend, but I’ll cross that bridge when I come to it.

Based on my metabolic test learnings, Zone 1 means ‘keep heart rate below 140’. Approximate FTP is 265W at the moment (indoor) so that will suffice for this exercise and I’ll aim for 240W on SST intervals. I haven’t decided yet whether to do them on the trainer or outdoors.

After two weeks’ holidays I’m well rested and well overweight, so I’m under no illusions that this will hurt.

Current fitness: CTL = 29, TSB = 19

Current weight: 92.4kg

Time to shift some lard. Bonne chance!

I’ve just finished almost two week’s holidays with my brother and his family. Although Cormac had visited me briefly when I was in Sydney, his wife Belinda and son Jacob had never been to Oz before, so we made sure to cram as much as possible into the ten days they were here for.

First off was a whirlwind tour around Brisbane, making sure to get a photo at the iconic sign.

Then it was off to Lone Pine Koala Sanctuary to see some Aussie wildlife. They’re a bit more relaxed with Koalas in Queensland, allowing you to hold one while getting a photo, so we took that opportunity to tick off a bucket list item for Belinda. It’s a sanctuary for over 130 koalas, so each animal only has to deal with people for a very short time before going back to munching on eucalyptus leaves and sleeping.

There are plenty of other animals on site and we got to feed some kangaroos and wallabies and also to see wombats, dingoes, Tassie Devils and more. I’d assumed we’d be there for an hour or so, but we ended up spending most of the day there. Well worth a visit.

Next stop was Port Douglas to go diving on the Great Barrier Reef. Cormac and Jacob had been getting their PADI licence specially, and I’d dug up my qualification I’d last used in 2002, so we were good to go. We booked with AquaQuest and I took advantage of their free “Intro” dive to do a quick refresh of the basics before doing a normal second dive with Cormac & Jacob. A great day out on the boat with a fun, professional crew looking after us and no sea-sickness despite the choppy conditions.

We managed to see some nice coral, found Nemo and spotted reef sharks, parrot fish and plenty more, though we missed out on turtles.

After the day on the ocean, it was time to investigate the land, so we opted for a walk through Mossman Gorge followed by a crocodile tour on the Daintree River aboard Solar Whisper which, as its name suggests, is a solar-powered boat. We got up close and personal with five different crocs in all, ranging from a 50cm juvenile to a 4m adult, while getting a running commentary on their personalities and behaviour.

We continued on up to Cape Tribulation, stopping at Daintree Ice Cream Co. to sample their wares. They grow a huge range of exotic fruits which they use to make their ice cream - check out black sapote if you come across it, a fruit with brown flesh which tastes like chocolate and has four times the vitamin C of an orange. Delicious!

We flew back to Brisbane for a day of relaxation before jumping in the car to visit my mother-in-law down near Byron. The weather wasn’t great on the first day, but the Paddies seemed happy enough down on the beach with the rain approaching!

The sun came out for the last day of the holiday, so we ventured in to Byron to check out the most easterly point in Australia, admire the views from the lighthouse and spend an afternoon swimming at The Pass. We even spotted some Humpback whales to round out our Aussie fauna tour!

One final drive back up the M1 to Brisbane, catching some rush-hour traffic, a hectic pack and then it was off to the airport early the following morning to send them on their way to my sister in NZ. From a balmy mid-20s winter in Queensland to single digits in Wanaka!!

As for me, well it’s time to knuckle down and start shifting this ballast I’ve acquired over the last year. With that in mind, I’ve entered the Noosa Classic in mid-August and I’ve got the Third de France starting at the weekend. More on that later.

In my previous post I mentioned how I’d estimated VT1 and VT2 and how they would be useful in the context of polarised training, so what is polarised training?

When it comes to building endurance, there are many ways mix up training intensities to produce a desired result. You can do lots of volume first and then add speed work, you can do speed work first and then add the volume. You can do lots of work just under your 1hr threshold, and there’s many more options behind that.

Polarised Training is a prescription popularised by Dr. Stephen Seiler. Dr. Seiler has done lots of research on how the best elite athletes train. He’s based in Norway, so his research has been with the Norwegian cross-country skiers, some of the best endurance athletes in the world. What he found was that the skiers would spend the vast majority of their training time at relatively low intensities and a small portion at really high intensities, with almost no time in the middle. These are Olympic or World Champion athletes, and on many of their training days he could keep up with them. He checked a few more sports, again with elites, and found that the pattern held.

Now the immediate objection that springs to mind is “if I’m doing 20-30hrs of training a week, then sure, lots of it will be easy” and you might assume it doesn’t hold for those of us with more modest weekly training hours, but no, further research has shown that the polarised model also works for athletes training 7 hours per week.

Pretty much anyone who coaches amateur athletes would agree that one obvious flaw in the way amateurs train is that we typically do our easy sessions too hard, and our hard sessions too easy, so this model makes sense from that perspective too. Take it easy when you’re supposed to so that you are fresh and ready to smash it when hard sessions are prescribed.

Dr. Seiler’s Polarised Training says that 80% of your sessions should be at an intensity below VT1 and the remaining 20% of sessions should be above VT2, or the splits in hours per week should be 90% below VT1 to 10% above VT2. Training below VT1 trains your fat burning system, which improves your fuel use at all intensities and also builds lots of mitochondria, the engines of your cells.

Bear in mind too that this is my summary of his decades of research, but, if you want to hear from the man himself, he has appeared on Velonews’ Fast Talk Podcast a number of times to explain his research in more depth.

Dr. Seiler isn’t the only one talking about this. Dr. Phil Maffetone has been coaching for decades and has a similar prescription, providing a method for calculating your aerobic training heart rate which you should not exceed. The goal also being to build a solid aerobic system.

In terms of my training plans, I can train approx. 10hrs per week, so when adopting the polarised approach nine hours should be below VT1 and one hour should be above VT2. In reality, it will take me a while to build up the fitness required to handle that much high intensity, so any intervals I do will fall a little short of VT2 initially.

My brother and his family are arriving tomorrow morning for tens days holidays, so I won’t be doing much cycling between now and the beginning of July and putting the polarised model into practice will have to wait until then 🙂

The output from my metabolic test last week was a spreadsheet of raw data from the metabolic cart, which is food for further analysis. What do the numbers mean, how can I use them to inform my training etc. etc. Here’s a first pass at what I’ve managed to figure out so far.

Ventilatory Thresholds

There are two ventilatory thresholds, VT1 and VT2, which signify fundamental shifts in what’s happening your body as you exercise. VT1 is the point at which lactate levels in the blood begin to increase beyond resting levels and is usually marked by an increase in your breathing rate. Above VT1 lactate levels will increase as your effort increases, but will stabilise if you settle on a consistent effort. Your body can recycle lactate as fast as you produce it. VT2 is the point at which your body cannot recycle lactate fast enough and even if you are doing a consistent effort above VT2 lactate will keep increasing until you can’t exercise any more.

There doesn’t seem to be a simple formula you apply. Rather you graph breaths per minute and eyeball the points at which the slope of the graph appears to change, so it’s inherently subjective. In the above graph, VT1 appears to be around 138bpm for me, and VT2 is around 172bpm. VT1 seems about right based on experience, though VT2 feels a little too high.

What’s the relevance of VT1 and VT2 for training? Well in a Polarized Training model, which I’ll discuss in the future, the aim would be to do the vast majority of your training below VT1, with a small amount above VT2.

Fat Usage

My current weight is just under 92kg and I know from previous DEXA scans that my lean body mass, i.e: my weight if I were 0% body fat, is about 72kg. That’s a lot of lard to be carrying around, so what’s the ideal way to get rid of it? Well there’s only one way to get rid of it and that’s to get the fat released from your fat cells and burn it off.

Looking at my fuel substrate usage graph, taken from my earlier post, I can see that I burn approx. 0.75g of fat per minute consistently, from 100W all the way through to about 225W, or, in HR terms (going back to the spreadsheet), right up to about 155bpm.

You often hear that there’s no such thing as a fat burning zone and that you should just focus on working as hard as possible to burn more calories. However, as you can see from the graph above, that’s bollocks. There’s definite point at which I start burning less and less fat. It turns out too that my graph is indicative of pretty decent fat burning ability. Many people will never burn .75g/min at any level and may see significant drop off of their fat burning well before they get to 150bpm. Make a person like that train at high intensity and they’ll burn mainly carbs and the fat sitting around their gut won’t be burnt at all.

Even with a decent fat burning ability, at 170bpm I’m burning a total of about 1150kcal per hour, but I’d struggle to last a full hour at that rate, so I’d burn a max. of 46g of fat. However, at, say, 125bpm, while I’m only burning 690kcal/hr I burn a bit more fat at the lower intensity so I get rid of 53g of fat per hour. Significantly, at that effort I can ride for 5hrs or more if I felt like it, so in theory could burn off 250g+ of flab. Even if I only wanted to ride for one hour, I’d still burn 53g of fat at the easy pace versus 46g if I flogged myself.

Back to my weight. Weighing in at a hypothetical 82kg would leave me at a pretty athletic 12% body fat, so let’s do the maths. That’s 10kg of fat to shed, at a rate of 53g per hour, for a total of 188hrs of bike riding! At a max. of about 10hrs/week that’s four months of consistent riding. On the one hand it seems like a long time on the bike, but on the other, four months of work to reverse years of weight gain doesn’t seem too bad.

Foreign Affairs has a good article on The Self-Destruction of American Power, looking at where it all went wrong, from the World’s sole superpower after the fall of the USSR to the modern day retreat from any sort of international cooperation.

The Trump administration has hollowed out U.S. foreign policy even further. Trump’s instincts are Jacksonian, in that he is largely uninterested in the world except insofar as he believes that most countries are screwing the United States. He is a nationalist, a protectionist, and a populist, determined to put “America first.” But truthfully, more than anything else, he has abandoned the field. Under Trump, the United States has withdrawn from the Trans-Pacific Partnership and from engaging with Asia more generally. It is uncoupling itself from its 70-year partnership with Europe. It has dealt with Latin America through the prism of either keeping immigrants out or winning votes in Florida. It has even managed to alienate Canadians (no mean feat). And it has subcontracted Middle East policy to Israel and Saudi Arabia. With a few impulsive exceptions—such as the narcissistic desire to win a Nobel Prize by trying to make peace with North Korea—what is most notable about Trump’s foreign policy is its absence.

Following on from my previous post about the age of loose money comes this article from Capitalist Exploits with some of the same concerns, namely that we’re partying like it’s 1999 again.

There are only two ways VC can get liquid: a buyout or an IPO.

And given that so many of the famous “unicorns” are valued at multiples that make my eyes shoot blood, there are now an ever decreasing number of companies that make suitable suitors.

So we’re down to flogging this stinking pile to the folks who always get roasted, especially at the tail end of a boom: retail investors… which is why we’re seeing tech unicorns IPO-ing.

This is a good strategy for VC, so long as those retail investors buy what is being sold.

The trouble now is that there are early signs that the appetite for these “growth” stocks is collapsing like a teenager after a bottle of Absolut on spring break.

Interesting article at The Reformed Broker looking at the current state of finance markets where money is essentially free and a company’s style is more important than its substance - image is valued more than assets.

There are no asset managers who represent their strategy to clients as “We buy the most expensive assets, and add to them as they rise in price and valuation.” That’s unfortunate, because this is the only strategy that could have possibly enabled an asset manager to outperform in the modern era. It’s one of those things you could never advertise, but had you done it, you’d have beaten everyone over the ten-year period since the market’s generational low.

But almost every investment professional says that they do the opposite of this. Even the explicitly growth-oriented managers use terms like “at a reasonable price,” to communicate their place on the spectrum of speculative chastity. There are no textbooks lauding an investment approach where it makes more sense to buy PayPal at 4 times book on its way to 9 times book while forsaking Goldman Sachs at less than 1 times book.

Some of this is no doubt down to network effects - AirBNB’s product can be rolled out in a new market for a negligible cost compared to a major hotel chain moving in to a new territory - but you still wonder if this is some sort of repeat of the Dot Com boom where most tech companies were massively overvalued based on hype.

I’ve had a similar discussion with a friend of mine regarding buying property. We both took the rational approach of not buying for a long time as the market was severely overpriced, and, in my case, when I did buy I bought something I could afford to repay even if rates went up a few percent. In this age of free money, that was completely the wrong strategy. The correct one was to borrow as much money as the bank would give me, get an interest only mortgage to lower repayments and just get rich off the capital appreciation without repaying any of the principal. Is this a temporary aberration, or the new normal?

I went and had a Metabolic Test yesterday. A what, you ask? A metabolic test - you get on a stationary bike, they hook you up to a metabolic cart which measures the volumes of oxygen and carbon dioxide you inhale and exhale. You start cycling at a very easy rate, and every few minutes the rate increases until you’re too exhausted to cycle anymore. The data from the metabolic cart allows you to determine how much of your energy expenditure is coming from fat (FAT) and how much is coming from carbs (CHO) and how that changes as your effort increases.

Why Do This?

Well, it all started last year when I had finished a pretty consistent year of training and I looked back at my cumulative training data. I’d ridden a touch over 11,000km and burned about 270,000kcal but I hadn’t lost any weight. Sure, I have a sweet tooth and eat too much jellies etc. but overall my diet is pretty decent - bugger all processed food, cook most meals etc. etc. so I thought I’d have dropped a few kilos at least.

I’d read a little about metabolic tests over the years and decided I’d like to try one out, but the only place I could find that was offering them to the public was Jupiter Health on the Gold Coast, which isn’t convenient from Sydney. However, since we were moving to Brisbane in May 2018, I booked an appointment for late May last year. I did the test and it showed I was a really bad sugar burner, i.e: I was getting most of my energy from CHO on the bike and hardly burning any fat. This seemed to explain why I wasn’t losing weight - after all, if you’re not burning off your fat stores while exercising, when are you going to burn them off?

I haven’t done much training over the year since, but I have been reading about how to improve your fat burning. Alan Couzen, an exercise physiologist and coach has some informative articles, particularly How to turn yourself into a Fat-Burner, and while reading that I came across his articles on how you go about getting your fat burning tested, i.e: how to do a proper metabolic test, particularly Getting your ‘fat burning’ tested Part 1: Equipment and protocol.

Reading that confirmed some suspicions I had about the test I’d had done on the Gold Coast and the data I’d obtained from it. The two major concerns I had was that the basal rate data, obtained when you’re lying on a bed doing nothing for 15mins, showed me with a heart rate around 90-100bpm, which is about twice what I’d expect in that scenario. There was also a bit more fluctuation in the power data at each level and the time at each level didn’t seem to be consistent. I followed Alan’s suggestion to check with my local University’s Exercise Physiology department to see if I could do a test with them.

Luckily for me, I have Uni of Queensland (UQ) and Queensland Uni of Technology (QUT) to choose from, and, as it happened, QUT have their E3 Lab a 20min drive away, so I emailed them with my requirements and they were able to help.

The Protocol

Alan’s site provides a calculator where you can enter your estimated FTP and it pumps out your suggested starting level and how much the power output should be increased per level. It recommended that I start at 130W, but since the data from the previous test showed I was already starting to burn significant amounts of carbs at that level, I chose to start at 100W instead.

• Each level lasts 5mins.
• Start at 100W, then add 25W per level.

The guys doing the testing told me to tell them when I knew I would not be able to complete the next 5min level and we’d stop the test.

The Test

The test itself isn’t too exciting. As described, you start pedalling at an easy pace and it just keeps getting harder. The first 20 minutes are a bit boring as the work load is quite low and I was just trying to maintain a smooth pedal stroke and consistent breathing, i.e: instead of shallow breathing at low workloads, to try consistent deeper breaths throughout the test.

Wearing the mask take a bit of getting used to - at the start of the test you feel a bit weird as you’re not really breathing very often so it feels like the mask is keeping your mouth shut. Your heart rate is probably a few beats higher as a result too. As you start working harder and breathing more it becomes a non-issue.

The tightness of the straps keeping the mask on my face meant it was tricky to find a comfortable head position. Maintaining a normal riding position as if I was out on the road meant they were digging into the back of my head, so looking down at the bottom bracket seems to work best. I was getting a bit of a headache towards the end of the test too, most likely due to the straps’ tightness. However, tight straps equals tight mask seal equals accurate data!

Results

Here’s the basic fuel substrate use graph, with power output on the X-axis and kcal/min on the Y-axis.

So, when I’m exercising at 100W (v. easy) I’m getting a bit over 7kcal/min from FAT and almost nothing from CHO, and by the time I fell apart at 275W I was getting a bit under 6kcal/min from FAT but 15kcal/min from CHO.

Peak volume of oxygen consumed (not shown on graph) was 4.85L, giving me a VO2Max of 52.8ml/kg at 92kg, which just scrapes into the 95th percentile for my age, so happy enough with that. I can bump it a few points more by dropping a few kilos, plus the test protocol I used wasn’t ideal for finding a true max, so there may be room for improvement there too.

It turns out that I’m actually a good fat burner, which is the complete opposite of the earlier test. The most likely explanation for this about-face is that there was not a good seal around my nose and mouth when doing the first test, so the machine wasn’t only measuring the air I was inhaling and exhaling. That could skew the results significantly. It’s also the case that the equipment available in the Uni lab was much more professional than that in use the first time around, so accuracy was a lot better.

Normally these tests run until you start going anaerobic, at which point you are burning zero fat. However, I never got to that point, still burning a decent amount of fat at the last stage of 275W. I’ll need to read up on that, but I suspect it’s just an endurance issue - I’m just not fit enough to get to pure CHO burning given the 5min/level protocol. I’d definitely get there with shorter levels, and would probably have gotten there if I’d started at Alan’s suggested 130W.

Moral of the story: instead of going to the local physio/fitness place, take the advice in Alan’s article and see if your local Uni will run an experiment on you.

The downside is that I now have no excuse for being over 85kg, so I’ll just have to knuckle down to consistent riding and improve my diet quality as well. No shortcuts 🤣

Idle Words has a good article on [The New Wilderness](https://idlewords.com/2019/06/the_new_wilderness.htm} on the nature of privacy in the Information Age. What does it mean when your every move is tracked and recorded online, and increasingly offline as well?

Until recently, ambient privacy was a simple fact of life. Recording something for posterity required making special arrangements, and most of our shared experience of the past was filtered through the attenuating haze of human memory. Even police states like East Germany, where one in seven citizens was an informer, were not able to keep tabs on their entire population. Today computers have given us that power. Authoritarian states like China and Saudi Arabia are using this newfound capacity as a tool of social control. Here in the United States, we’re using it to show ads. But the infrastructure of total surveillance is everywhere the same, and everywhere being deployed at scale.

The author discusses the similarity with the growth of environmental regulation as mankind changed from a being part of Nature to being a threat instead and suggests that we need to start thinking of global regulations around what is and is not acceptable when it comes to mass surveillance.

We’re at the point where we need a similar shift in perspective in our privacy law. The infrastructure of mass surveillance is too complex, and the tech oligopoly too powerful, to make it meaningful to talk about individual consent. Even experts don’t have a full picture of the surveillance economy, in part because its beneficiaries are so secretive, and in part because the whole system is in flux. Telling people that they own their data, and should decide what to do with it, is just another way of disempowering them.

Our discourse around privacy needs to expand to address foundational questions about the role of automation: To what extent is living in a surveillance-saturated world compatible with pluralism and democracy? What are the consequences of raising a generation of children whose every action feeds into a corporate database? What does it mean to be manipulated from an early age by machine learning algorithms that adaptively learn to shape our behavior?

Interesting facts on the Saturn V rockets, from Wired’s Beauty and Madness of Sending a Man to the Moon…

The fires on which it rose were not the fire that leaps or licks or plays, the fire of brasier or boiler. They were the focused fire of the metalworker’s torch, given life at a scale to cut worlds apart or weld them together. The temperature in the chambers was over 3,000°C (more than 5,000°F). The pressure was over 60 atmospheres. And still the pumps, their turbines spinning 90 times a second, were powerful enough to cram more and more oxygen and fuel into the inferno. The flames slammed into the fire pits below at six times the speed of sound. For a couple of minutes, the five F-1s generated almost 60 gigawatts of power. That is equivalent to the typical output of all Britain’s electric-power plants put together.

Looking at the generation statistics from Australia’s National Energy Market, our generation capacity in 2019 is only 46GW.

Part of making lunar-orbit rendezvous work was making the spacecraft that actually went down to the moon, the LM, as light as possible. In the original specification it was to weigh just 10 tonnes (11 tons). During development, it put on weight, despite furious attempts first to arrest and then to reverse the process. But it remained pretty tiny. And thanks to the need to carry fuel, oxidizer, life support, batteries, computers and more besides, the LM was noticeably smaller on the inside than the outside. The two astronauts had 4.7m3 (about 165 cubic feet) of pressurized volume between them. That is roughly twice the volume of one of London’s red telephone boxes.

Just goes to show how much energy is required to put such a small volume on the Moon, assuming of course that you want it to come back 🙂