SUPERMAN
Starting Position
Sit on your hands and knees on an exercise mat.
The hands are directly beneath the shoulders. The knees are directly beneath the hips.
The core is tight and the spine is neutrally aligned.
Execution
Extend one leg and lift the opposite arm until they are in line with the body.
Return to the starting position and repeat for the prescribed number of repetitions.
Advice
Placing a stick or tennis ball on the lower back can give extra feedback about the alignment of the spine.