Should I worry about working out too hard?

Endless studies show the physical, mental and longevity-based benefits of working out, while plenty suggest that avoiding activity is bad. But read one headline about someone collapsing after a row, or talk to someone whose friend got stress fractures from running, and it sticks in the mind. So, how risky is training too hard? And is there a way to make sure you never cross that red line into dangerous territory? Read more “Should I worry about working out too hard?”