Start Position is down in the lower press-up position.
Maintain a rigid alignment of the trunk and legs with the body supported by the arms and toes.
Hold in the start position for 20 seconds then move to a 3-point support by lifting an arm or leg and then hold, if you can maintain perfect form in this position for 20 seconds advance to a 2-point support by lifting the opposite arm or leg.
Look downwards to keep the head aligned with the trunk and breathe evenly throughout the exercise.
