A couple months ago I was in the best shape of my life, when all of the sudden my performances started going downhill. I noticed that the problem was related to my calves, and that they felt really weak whenever I went for a run. My calves have been weak and fatigued for nearly 3 months now and no one can seem to figure out what's wrong. There is no pain, just tightness and fatigue. Test for compartment syndrome was negative. I took 2 weeks off from running and the problem persisted when I tried to run again. I was wondering if anyone else has had the same problem.