
Crunch with Legs on Bench
Abs


Core / Intermediate / Isolation (single joint)
A crunch on a decline bench with feet anchored that strengthens the abdominals through a greater range and load than a floor crunch.
Why it hurts: The neck flexes hard under the arm pull and gets strained.
✓ Instead: Touch the fingertips lightly behind the ears or cross the arms on the chest and look at the ceiling.
Why it hurts: Repeated fast spinal flexion can irritate the discs, especially for people with a history of back pain.
✓ Instead: Do fewer, slower reps and mix in anti-movement core work such as planks and dead bugs.
How specific this exercise is to each movement.
Illustration: Everkinetic (everkinetic.com), CC BY-SA 4.0.