Core
- Primary muscles
- Abs
- Secondary muscles
- Obliques, Quads
- Equipment
- Body weight
- Movement pattern
- None
Steps
- 1 Lie on your back with your knees bent and feet flat on the floor. Place your hands behind your head with your elbows pointing out to the sides.
- 2 Lift your head and shoulders off the floor, simultaneously bringing your right elbow towards your left knee. As you do this, extend your right leg straight out.
- 3 Return to the starting position by lowering your head and shoulders and bending your right knee.
- 4 Immediately repeat the movement on the opposite side, bringing your left elbow towards your right knee while extending your left leg.
- 5 Continue to alternate sides in a controlled manner.