Exercise library · Abs
Jack Knives
The Jack Knives is a bodyweight exercise that targets the abs, with the hip flexors assisting. Follow the 6 steps below and watch the demo to check your form.
- Target muscles
- Abs
- Also works
- Hip flexors
- Equipment
- Bodyweight
- Body part
- Waist
Step by step
- Lie on your back with your arms extended overhead and your legs straight.
- Engage your core and lift your upper body and legs simultaneously.
- Reach your hands toward your feet as your body forms a V-shape.
- Squeeze your abs at the top of the movement.
- Lower your arms and legs back down in a controlled motion without letting them touch the ground.
- Repeat for the desired number of repetitions.
Related exercises
One of 800 exercises in Bravel
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