Never. But I think it’s something to do with your individual physiology, some people are more prone to throwing up after (or during) exercise. I don’t think it’s actually a sign of how hard somebody is training - someone else might be training just as hard, but isn’t affected by that same type of nausea.
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I don’t think that’s controversial. That’s the whole point of a VO2 block.
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Eh… I don’t vomit but I make myself dry heave when I do v02 max intervals. Especially when I first pick them up and am working from 90 seconds to 3 minutes. Doing them outdoors instead of on the trainer makes it worse because with the extra cooling of the outdoors, it’s so much easier to hit the gag reflex.
Most of this year and into 2025 I expect to dry heave every 7 - 14 days 
Same. Some of the more intense TR workouts get me right on that limit. Tough to pedal thru physically but can also be a mental boost knowing you are pushing your boundaries… As long as the interval is almost over
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I’ve never thrown up, ever, but in XC running races ,the Ramp test, and the finish of a CX race, I can’t turn the pedals, and gasping for air(like asthma) and my legs feel like jelly, + I sometimes feel light headed.
I do sometimes feel nauseous , due to too much caffeine. I’ve run out of my favourite energy drink(Torq energy) and for my 2.5 hour tempo session I decided to put 2 banoffee caffenated gels and an orange and banana gel into a Litre of water. It tasted disgusting, 
but I got it all down during the session which went well.
However for the rest of that afternoon /evening I felt nauseous, with some gut cramps. Strangely, my legs felt fine
I kind of wondered if I can’t push myself to these extremes, if I am mentally weak.
In my experience it seems like there are pukers and non-pukers. In 30 years of often heavy running and cycling training, I’ve never puked. I have, on many occasions, trained intesity to the point of physical non-function, so not like I had a lot left if only I were mentally stronger. But I’ve trained with some people for whom no workout was complete without a bit of an upchuck, even on what I thought of as fairly doable efforts. I think it’s either personal or related to poor pre-training diet choices (or both).
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Only in the velodrome.
I’d say no. You just have a better build stomach.
Never, not once.
And that includes plenty of VO2 intervals, and all out max power tests (1,2,5,8,10,20 Minutes) where a handful have had me non-functional lying on the floor for 10 minutes afterwards.
I’ve gone hard enough to throw up ONCE in my life, and that was the final run in the Navy bootcamp fitness test (circa 1990), knowing that if I didn’t make the time, I’d get held back for a week or so. Totally worth it.
It’s never happened to me……thankfully!
Joe
The pukers fall into 2 groups
Those that try to train hard on a full stomach
Those that have a lot of type 2 muscle fibres and are able to quickly generate large enough amounts of lactate that the acidosis tricks the brain into thinking they’ve been poisoned, which then prompts the vomitting in an attempt to get rid of the “poison”
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Following on from my original question, I wonder what the answer would be if it was only asked of Olympic 800m gold medal winners?
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Never in my life, mostly because I don’t eat anything beforehand that would make me need to throw up. I read a theory once that it CAN be a response to your body trying to lower overall acidity rapidly, so it would make sense that an 800 runner (e.g.) would be more inclined to do so or, someone doing shorter power glycolytic efforts, etc.
As a former 800 runner, I can attest that I think it’s the hardest event there is. I often tell my athletes before a 2-min power test that “this is the worst thing you will ever do”. You get 90 seconds of sugar and then hold on for dear life. The 800 is just an awful event. 
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This is the first time I’ve ever heard anyone else say this. Solidarity brother. Pretty awful feeling.
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Nope I don’t find all out makes me want to puke. But then I don’t do sprint training. Hardest I go is VO2 max intervals from 30 secs to 5 mins.
Took me some time to recherche this, didn‘t find it in the forum. Aren‘t Zwift races around threshold while Vo2Max are a tick harder?
In Zwift races I can hold FTP for long, sometimes 60min+. The next day I feel my legs, but I‘m mainly tired in general. These races are super hard (RPE 9-10).
While Vo2Max intervals give me tired legs, but not much more. My legs give out long before anything else. I get high HR and heavy breathing, but it‘s just some minutes. It feels hard during the interval, but not all-out or like puking at all.
I’m not sure what you’re referring to. I was replying to this comment
If you read the VO2 Block posts, you’ll see lots of athletes and coaches talking about how you go so hard during the block that you need long periods of recovery (a week or more) afterward.
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I only ever came close when I ate the wrong breakfast before a VO2 workout, once. Think it was eggs and bacon or sausage. I can eat that shortly before a spirited mtb ride, though, no problemo.