This exercise works your chest and core. Lie on your back with heavy weights in your hands. Extend arms and legs towards the ceiling, over your hips, weights and hands together, facing each other. Slowly lower your left leg as you fly right arm out to side, working chest. Return to starting position and repeat the move using your right leg and left arm.
1 set consists of 10 repetitions on each side. Attempt 3 sets.
To make this exercise even more intense, you can squeeze in a 30-60 second plank on your elbows in between sets.