Jackknife

Note: This is just a visual reference — it may vary depending on your setup.

Strength Core

Core

Muscle Activation

Abs · Hips · Oblique · Thighs · Waist

90%

Hip Flexors

10%

Equipment

Exercise Mat

Setup / Starting Position

Lie on your back on an exercise mat with your legs extended and your arms extended overhead.

Exercise Position

Simultaneously lift your upper body and legs, reaching your hands towards your feet.

Form & Performance

Keep your legs straight and lift them towards your upper body as you crunch upwards.