High Fat Low Carb, Zero Fuel - 145 mins @ 160 BPM - Finished 4th Place

42 yrs old, have done 5 Sprints over last 10 yrs, 3 in last 2, this was my first event over a Sprint. Stretched Olympic: 2k swim, 55k bike [swim bike only; longstanding injury]. Done @ 32 C + hum = “feels like” temp 46 - 47 C.

Finished 4th, 37 s behind a guy going to World’s this July.

[ S-B results only; we are nowhere near as fast as the semi-pros in the full tri. It was a tiny # of ppl, but my time was pretty damn quick, regardless. And I only train 1hr, 3 x / wk. I would not “…be faster if you ate sugar…” I would be faster if I trained more, period. ]

Last fuel was night before; dinner, approx 9 pm.

HFLC + IF for abt 4 yrs now. I literally only eat food twice a day; lunch btwn 12 - 14:00, dinner 20:00 - 23:00. Never bothered to make a post in past, bc “Nobody cares; irrelevant; it was just a Sprint.” brigade would ensue, 100% sure.

My blood chemistry; insulin levels, cholesterol, blood sugar, etc, are perfect, and have been for four years. Before this, I was told I was pre-diabetic, even though I have had roughly the same activity level, BMI, and weight, for years.

I think this proves that it works, for Z6 effort, not “Only good for End - Tempo.” , for 2.5 hrs straight, zero rests, zero breaks.

I am not “Only N = 1”

I am one more N… and that number is growing, as more ppl realize / learn / acknowledge that sugar [ which all “carbs” are ] is absolutely not our natural diet, and absolutely terrible for your health, and that natural fats, all of them, are not.

Fat does not cause heart disease. Sugar does.

If you scrape your knee and get a scab, that scab has lots of red blood cells in it, that have iron in them. Nobody tells you the scab is from too much iron in your diet. It is the exact same for arterial plaque. The only data they had to conclude fats cause it is that it is made of cholesterol, fats, and other compounds.

I used to get terrible blood sugar crashes almost daily; light headedness, dizziness, extreme muscular fatigue and mental confusion. All gone. My longest ride was 6 hrs, last fuel was night before. I have infinite energy, forever, essentially.

This past weekend, worked Sat & Sun, 14 - 16 hrs on my feet all day in +30 C, mostly doing hard labour. Only had dinner Fri, Sat, & Sun. Zero drops, zero tiredness, fatigue, etc.

I am extremely happy I live like this. At first, I said I would just try it for a month, and see if it helped me feel better. I never knew it would help me come closer to actually podiuming an event, and give me the energy & stamina to do longer events.

[EDIT: To add: It’s widely acknowledged that our education systems do not do a good enough job of giving people just a basic level of science knowledge, so that they can make informed decisions about their lives, health, etc.

Even the word “carbohydrate” is a garbage chemical term; all it means is any compound that contains carbon and hydrogen. Billions of them. Ergotamine is a carbohydrate.

What we call “carbs” are just long chained-together sugars. They breakdown extremely fast to just sugars, and that is what they are, when our bodies process them for energy: They go straight through our cell walls and get burned directly for energy.

Protein & lipid metabolism is an entirely different pathway; they must be absorbed across the cell membrane via complex processes [no clue!] = much slower, and then broken down, energy extracted, and then our bodies must create their own glucose to burn for energy via gluconeogenesis. Or something like that. Again, rly very little clue. But the dead-point, that is absolutely true is that it’s an extremely slow burning process that allows us to function for hours and hours on end because it doesn’t completely frack up our insulin, blood sugar levels, etc.]

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You seem like you are out to prove something, so I’ll bite I guess:

Do you have any evidence to support this?

I don’t think ‘perfect’ blood chemistry exists. do you mean in a healthy/normal range?

Did you ever go into Z6? how does this prove that HFLC works for Z6?

citation needed

I don’t think this is true.

I’m happy it’s working for you, keep it up if it works/makes you happy.

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2.5 hours? So, significantly less than a typical Boston Marathoner completes the race in? Until very recently most marathoners ate very little during the race, and still ran fast. Do a 1/2 Ironman and come back with results.

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@BenB not “…out to prove…” anything! :slight_smile: Sharing info that worked spectacularly for me with others, for their consideration, as it may work extremely well for them, too.

Also adding more info to trash the pile of horse manure idea that if you don’t cram as much sugar down your gullet as you can without vomiting or having to have a bowel movement in a race [ " training your gut " :roll_eyes: ] you “can’t perform well, or do long Z5 - Z6 efforts.” It is not true, dead stop.

If people like to, and choose to, use sugar, that’s up to them. But we need to stop propagating the dead-wrong idea that you have to, or you can’t perform well.

I spent most of the race in Z5 - Z6; my avg for the entire time was 159; north of my Z5 border, with short pops into Z7 and no need to take breaks, catch my breath, etc. Are we not looking at the same pictures ?

image

@Erik_Wahlstrom my post is about doing a stretched Olympic, as above. I made no mention of a half, full, or any other distance above what I completed, period. I of course can’t have any clue how this nutrition would work for me for that distance unless I completed it. Politely: I think you just got a bit off track, and to be friendly, I’m going assume that this little ‘bait-n-switcheroo’ wasn’t intentional! :slight_smile:

What I can tell you is that Zach Bitter doesn’t suck at life, and is on HFLC.

It is super worth note that the people & organizations who keep telling us sugar is fine, [ fruit, fruit juices, etc ] but natural fats like butter, tallow, lard, etc, are bad are the exact same people & organizations / same ‘nutritional zeitgeist’ that told us not to eat butter, because it would kill us, and to eat hydrogenated vegetable oil margarine instead. Only to then a few years later tell us extremely quietly

“Aaahhhhh, woopsy-doodle, this stuff is actually chock-full of trans fats and causes heart disease and cancer, LOL, soooooorry about that!”

…and this is not some wild conspiracy theory, nor did it happen in the 1870s, when we really didn’t know much about nutrition. This happened in our lifetimes, not long ago.

I think we may have different definitions of our zones. For me Z5 is above threshold and it wouldn’t be possible to hold Z5 or Z6 for more than a few mins let alone 2.5hrs.

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@BenB HR zones. I was above my threshold HR for the entire race. That threshold has been established by extremely well regarded software based on the analysis of hundreds of training hours.

If you want to call " I think those #s are off. " , you are welcome too, but I won’t agree.

I am not wealthy enough to yet have a PM on my bike, so no clue on Ws unfortunately. But my body was performing, for that time, in Z5 - Z6, in terms of work.

Racing jacks up heart rate, pretty well established as a general rule.

:man_shrugging:

Some pretty wild intensity claims without power data.

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and, you know, 32C.

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so what we know is that on a super hot day you were able to ride hard enough to keep your heart rate elevated for 105 minutes at a pace that requires roughly 160W for an average male on a TT bike, and you want us all to be really impressed.

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I’ve also done keto + IF with great success. Lost weight, felt great, held my power. I don’t dispute that. I would definitely look into my zones though, and your post does come across a bit like someone looking for an argument.

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We can debate ad nauseam whether or not carbs or fats cause cardiovascular disease but without any doubt we know no carbs=no tooth decay. Do with that information what you will, it’s free this time. Normally I charge money for that information and fixing the damage carbs do to teeth. But really I am glad people eat carbs, it pays for my bikes…

I am faster on carbs though,I do admit that …

All data and diet aside, congratulations on your result

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I’d be far more diplomatic.

However to your point…

FWIW this practice race was done without any fuel on the bike:

Power:

HR:

Salad for lunch, and a couple hours later ate real food snack that was carb heavy, and 2 hours later practice race.

  • 14 min to ride start, about a minute of downtime and we left
  • 35 min with average power at 98% FTP, and Intensity Factor of 1.04
  • 8 min regroup
  • 42 min with average power at 84% FTP, and IF of 1.00

I’ve got a LOT of examples like that, and all with an accurate FTP estimate.

My take: win in the kitchen, off the bike, and I don’t need to guzzle carbs while on the bike for 90 minutes or 2 hours.

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@jamesdanielosborne I can guarantee you I was putting out a hell of a lot more than that. W / kg = 2.53 and as said above, I only train 1 hr 3 x / wk. I’m sure I could get it higher if I had more hrs to train.

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Just so we’re clear here. Are you saying that HFLC made you do your threshold / above threshold power for 1h46min based on Heart Rate readings on a hot day?

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@BrianSpang thank you very much, I really appreciate that.

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I think so, and by extension we are asked to believe HR and power zones align.

Power and HR zones don’t align. There isn’t even a single agreed upon zones for HR. He is showing Friel zones in Intervals (the default), but what about British Cycling HR Zones? Or Coggan HR Zones? Or USA Cycling HR Zones? Those could be a far better fit to his physiology.

FWIW, personally I don’t need to drink a lot of sugar or eat gels on the bike for anything up to about 2.25 hours.

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@Pbase I apologize if it communicated any confrontational attitude at all. There’s a hardline between being emotionally heated and deeply frustrated at an idea, and wanting an argument.

Again: If people choose to use sugar, all the more power to them. It’s their life.

What gets me super heated is that everywhere you look, everyone tells everyone that you have to use sugar, or you can’t perform. You “will bonk”.

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Great work!! I’m glad you’re stoked with the outcome of your race :raised_hands:

It’s great that you have found a diet that works for you, and supports your goals.

The optimal diet for each of us depends on our unique goals, and a host of factors that provide the context for our lives. The science suggests that for the majority of endurance athletes, with performance as the primary goal, a LCHF is not optimal.

But that is not to say, it’s not optimal for anyone and it sounds like it works great for you @Chris1982! :raised_hands: :muscle:

I’d like to ensure that this thread remains constructive so I’m linking to our Community Guidelines. I encourage everyone to refrain from sweeping generalisations based on our unique experience.

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This does not align with

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