hip flexors
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TURN OFF THE HIP FLEXORS TO BUILD ABS
FINALLY FEEL YOUR ABS Most people never fully contract their rectus abdominis. Instead, they're using their hip flexors during ab flexion and crunches. If you can do 30 crunches, your form is off and your abs probably aren't working very hard. Those hip flexors are taking over and doing most of...- 01dragonslayer
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