Crunches are a classic core-strengthening move. The act of lifting your upper body works your abdominal muscles.
If you have occasional low back pain, do crunches with care — move slowly and start with just a few reps.
If your low back pain is chronic, talk with a certified trainer or healthcare professional before attempting this classic crunch. It may not be the best option for you.

- Start on your back. Bend your knees and plant your feet on the floor at hip width. Line up your head and spine. Cross your arms across your chest.
- Tighten your core and relax your neck and shoulders. Tuck in your chin and lift your upper back, keeping your lower back, pelvis, and feet on the floor. Pause.
- Slowly lower your upper back to return to the starting position.
- Start with 1 set of 8 to 12 reps.
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