The exercise crunch legs up abs primarily works the muscles Abdominals and secondarily works the muscles .

Proper position Lie on your back. Keep your legs bent and raised. Movement and breathing Contract your abdominal muscles and inhale deeply. Exhale as you lift your upper body, keeping your head and neck relaxed. Inhale and return to the starting position.

Proper position Lie on your back. Keep your legs bent and raised. Movement and breathing Contract your abdominal muscles and inhale deeply. Exhale as you lift your upper body, keeping your head and neck relaxed. Inhale and return to the starting position.