Sit-ups and crunches are phenomenal for strengthening the midsection, but a few performance SNAFUs can lead to low back pain (LBP), hip pain and/or groin pain:

Wrong! Too wide of an arc can stress the hip flexors (psoas) causing low back pain (LBP).

Proper abdominal crunches

Perfect! ~ 20 degrees is enough to work the abdominals while sparing the hip flexors and thus avoiding LBP.


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