Not All Fatigue Is Equal: Here’s What Each Type Means—and What to Do About It
Feeling tired during hard training is normal, but the word fatigue hides several different problems. When your legs feel flat from step one and stay that way through the whole run, coaches say the usual culprit is mileage stacking up faster than recovery. The stride itself changes: leg stiffness drops, cadence falls and each footstrike spends longer on the ground. Naming the specific kind of tiredness you feel, one coach argues, is the clue that tells you what is going on underneath and how to get your spring back.
For you: If your legs stay flat through an entire run and a warm-up does nothing, that is a reason to look at your recent mileage and recovery rather than push through.
What it shows: Reported by Outside and not verified by us: we could not trace this story to a published paper, so treat it as news rather than evidence we have checked.