Exercise library · Abs · Video
Backpack crunch: how to do it
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Backpack tight to your chest
Starting position
Lie on your back with bent knees and feet on the floor, holding the backpack firmly against your chest with both hands.
The movement
Curl your torso and lift your shoulders toward your hips, then lower your back slowly to the floor.
Most common mistake
Don't sit all the way up, lift only your shoulders and keep your lower back close to the floor.
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