
Crunch with Legs on Bench
Abs


Core / Advanced / Compound (multi-joint)
A bar exercise for the abs, with the forearms assisting.
Why it hurts: The shoulder joint hangs passively and gets strained.
✓ Instead: Push down through the forearms or hands to keep the shoulders away from the ears.
Why it hurts: Momentum replaces the abs and jerks the lower back.
✓ Instead: Curl the pelvis up slowly and lower under control.
How specific this exercise is to each movement.
Photos and instructions: free-exercise-db (github.com/yuhonas/free-exercise-db), public domain.