Hip flexion: In general, exercises that emphasize flexion of your trunk, such as sit ups and crunches, are best for upper abdominal muscles; and exercises that emphasize flexion of the hip, such as straight leg raises, are best for lower abdominal muscles.
Answered 2/24/2018
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8 doctors weighed in across 2 answers
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A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
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