Assume a push up position and get up on to your fingertips, with your fingers extended, hands about shoulder width apart.
Create a stable base and generate more tension by gripping the floor, and trying to squeeze your fingers together. Brace your core, PPT (tuck your tailbone) and squeeze your glutes.
Bend your arms, keeping your elbows tucked and maintain tension as you descend. Pause at the bottom, then drive through the floor and push yourself back to the start. Repeat for repetitions.