Weight-Plate Jackknife Sit-Up

Lie flat on your back on a mat holding a weight plate securely with both hands extended overhead.

Engage your core and simultaneously lift your straight arms and straight legs up toward each other.

Reach the weight plate toward your shins at the top of the movement while balancing on your tailbone.

Lower your arms and legs back down in a slow and controlled motion without touching the floor.

Inhale as you lower down and exhale forcefully as you crunch up into the jackknife position.