I will say it was one of the harder things I have ever done mentally in my life considering how much more awful I felt the entire time, on top of the other reasons normal folks feel awful about when doing a race and pushing their bodies. I have done several half marathons, powerlifting competitions and 1 half ironman prior to getting sick when my body was a machine into my late twenties. The combination of dizziness and having all of my limbs go pins-needles 3 minutes into the bike then numb after the 20 min mark and stay numb until the race's end was not pleasant. I am not sure how it is for others but when I train hard now my body needs tons of rest after. Like 2 days minimum. I would love to hear about others who compete and train hard, how it affects them and how long it takes them to recover. Also, are they doing PT for their POTS or anything special? What you compete in and so forth. I cannot wait for true Autumn and winter to try Cyclocross and some Ice races. "Go Hard or Go Home" let the paramedics sort it out.