traveyard: Proper form for TRX reverse-crunch lower ab exercise - While maintaining a flat back and a stable upper body, slowly contract your lower abs and draw your knees into your chest.

Proper form for TRX reverse-crunch lower ab exercise - While maintaining a flat back and a stable upper body, slowly contract your lower abs and draw your knees into your chest.

Proper form for TRX reverse-crunch lower ab exercise - While maintaining a flat back and a stable upper body, slowly contract your lower abs and draw your knees into your chest.

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Proper form for TRX reverse-crunch lower ab exercise - While maintaining a flat back and a stable upper body, slowly contract your lower abs and draw your knees into your chest.

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