Helpful Tip for Crunches

Proper Form For Crunches From the American Council On Exercise
Proper form is important for this exercise to prevent excessive stress on your low back. Individuals usually perform this movement too rapidly and recruit the hip flexors to assist with the upward phase. This technique tilts the pelvis anteriorly, increasing the stress on the low back and should be avoided. The abdominals connect the rib cage to the pelvis so the movement should focus on bringing these two body parts closer together while keeping the neck and shoulders relaxed.