I know there are several threads on how tough this workout is but I wanted to share my experience last night as the results shook me quite a bit.
So I live in Colorado (7300 ftt elevation) and have been doing TR plans for several years now. I’m on the Sweet spot base low volume and have VO2 max Tuesday workout progressed to Spencer + 2 (6x 3 mins 120% VOs Max with 4 min rests). I have been able to complete all previous workouts and did not expect any issues for Spencer + 2 (outside it being hard. I do my workouts in my basement (it’s a former golf cart garage so enclosed but drafty which helps for workouts). I also have a large fan pointed at me.
1st interval - hard but completed at expected numbers
2nd interval - harder but also completed without issues (usually I feel like my body has warmed up after the second interval and the rest are going to be harder but doable)
3rd interval - Hard but also completed but after it ended I needed to get off the bike as I felt like legs and lungs were fine but there was no oxygen going to my brain. Walked around a little and eventually just ran out of the house into the cold night to try to get more oxygen. It was a feeling of panic/drowning that I could not control. After a few minutes and just thinking about it freaks me out as I could not control the situation.
I was ok later and got on the bike and was able to do 3 mins at 80 % and then just spun for 20 mins. Later in the night the feeling was coming over me again so I just walked outside the house.
I have been in touch with my doctor and will have a check up tomorrow. No other scary symptoms and while I understand there could be other reasons in play that I will hopefully figure out soon, my question is, is VO2 MAX workout particularly at 3 minutes or longer, not recommended depending on altitude ?
PS I hesitated writing this as I know there could be other things that could have happened but wanted to see if anyone has experienced anything similar.