Assume a strong plank position with your hands almost touching on the ground and core tight (A), bend your elbows to slowly lower your chest to the floor (B).
Assume a strong plank position with your hands almost touching on the ground and core tight (A), bend your elbows to slowly lower your chest to the floor (B). Keep your upper arms tight to your body as you push back up explosively to a straight arm position. Repeat.