
Seated Leg Curl
Hamstrings


Legs / Intermediate / Compound (multi-joint)
A machine exercise for the hamstrings, with the calves and glutes assisting.
Why it hurts: The hamstrings are loaded hard while lengthening; losing control can strain them.
✓ Instead: Lower as slowly as you can, use your hands to catch and push back, and add range over weeks.
Why it hurts: The hamstrings stop working at length, which is where sprinters need strength.
✓ Instead: Keep a straight line from knees to shoulders as you lower.
How specific this exercise is to each movement.
Photos and instructions: free-exercise-db (github.com/yuhonas/free-exercise-db), public domain.