If you're going to reply (which would be appreciated), please take the time to fully understand the situation by reading the entire post. Thanks. So... over the summer I took up cross country as a favor for a friend, as training for tennis, and for fun. I was really, really good at running (especially for a first-year runner) but then I got shin splints really badly. Even with shin splints, I consistently outran my teammates until one day I couldn't run anymore and had to walk during cross country practice. The next day, I woke up not feeling so well (extremely tired with an extremely sore throat). My mom took me to the doctor and they ran a quick blood test and they found that I have mono. I think I actually had it for about a week before it was diagnosed, and that it had just been sapping my energy (I'd slept more than usual that week). Well, I'm starting to recover now after just a week. The sore throat is almost gone, but not quite, and I think I've rested plenty. My shin splints should be gone by now just because I have done absolutely no running or anything for a week. However, it's not all good news. While I was sick, I lost ten pounds just from not eating enough (I couldn't eat at all one or two days because my throat was that sore). I'm not the kind of person who needs to lose weight because I am 6'1 and was about 143 pounds before cross country. All that to present this dilemma: Should I rush my body and try to compete in cross country this season? Or just take the fall to rest and start working on my tennis physique and weight gain? I love tennis much more than running but I feel like I have something to prove in cross country. My body is made for running and I really want to be the comeback kid because I love to make people proud of me and impress them. But, I may not have the energy to do it because the energy loss from mono I've heard can last for months. And if I didn't have the energy, I'd just force myself to do it and end up hurting myself because I want to do well so badly. I think I am a masochist (not in the sexual sense... ew). But really. I'm thinking I should go against my tendencies to be a self-destructive idiot and just sit this season out and start getting ready for tennis, but I want to hear some opinions because IMO the best posters on TT are in the Health and Fitness section.