I go to yoga classes when sick -- not when very contagious, of course, but when bloated from TOM, or fatigued and sore from a virus, or something like that. Usually I'll choose a lighter vinyasa class and tell myself I can take breaks when I need to. Half of the "sick" feeling is simply psychological, though: once I begin, my competitive need to not fall behind the group means I usually go through the practice without adjustments, and I feel much better afterwards.
Just now, I used a more intense version of the same strategy, and went on a 5:30 am group run (with strangers who meet at the same place every M/W/F). Not only did they not know I was unable to fall asleep all last night due to my virus, they're all experienced marathoners in much better shape... the 4.3mile course (at an 8:30 pace) pushed me to my limits, while the other women were just chatting and jogging along, but I finished with them, and that's a personal victory.
For me, it's helpful to rely on other people not cutting me slack to push through the temptation to baby myself, while being aware that if I really need to let up, that option is always available.
... It is never too late to be what you might have been.
Last edited by lackadaisy; 04-25-2011 at 08:10 AM.