Fatigue is part of running. If you’ve ever finished a long run with heavy legs or felt that lingering soreness after hill repeats, you know what I'm talking about. The question isn’t whether fatigue is good or bad it’s what kind of fatigue you’re dealing with. Because there’s a big difference between the stress that helps you adapt and the stress that slowly breaks you down. One builds stronger muscles, tendons, and a more efficient cardiovascular system. The other leads to s