Mastering The Jack Knife: Guide, Form, Flaws, Set Up & Execution

Exercise Advice:

• Lay on your back (on the ground or exercise mat) and completely stretch out with your arms and legs fully extended.
• Grasp a kettlebell with both hands and position it behind your head with your arms extended. (If wanting to add weight)
• Simultaneously raise your arm with the kettlebell (If desired) up along with your upper body and also raise your right leg up while crunching your abdominals.
• Slowly lower the arm and kettlebell (If chosen) down to the starting position and repeat with the opposite leg.