Exercise Library
Band Jack Knife Sit Up
Lie on your back with a resistance band anchored behind you and hold the band ends at your shoulders. Keeping your legs straight, simultaneously lift your torso and legs in a jack-knife motion toward each other, engaging your core. Lower back down in a controlled way, maintaining tension in the band and your abdominal muscles throughout each rep.
Primary muscle
Abdominals (rectus abdominis)
Secondary muscles
obliques, hip flexors
Equipment
Band
Category
Abs
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