Plank
Increase the core strength as well as shoulders, arms and legs.
Så gör du Plank
Start on all fours on the floor placing your hands directly beneath your shoulders.
Straighten your legs to lift your knees off the floor. Keep your neck in a neatral position as you hold yourself up on your hands and toes.
Keep your upper body and lower body in a straight line and actively push away from floor.
