
Seated Leg Curl
Hamstrings


Legs / Beginner / Isolation (single joint)
A bench isolation exercise for the hamstrings, with the glutes assisting.
Why it hurts: The hamstrings lose tension and the lower back sags.
✓ Instead: Keep the hips lifted in a bridge throughout, then curl the heels in.
Why it hurts: The hamstrings are loaded suddenly at length and can cramp or strain.
✓ Instead: Extend the legs slowly under control.
How specific this exercise is to each movement.
Photos and instructions: free-exercise-db (github.com/yuhonas/free-exercise-db), public domain.