Kneel down on your knees and rest your (extended) arms on the floor wider than your shoulders. This is your starting position.
Lower yourself down until your chest is a couple of inches above the floor and then push yourself back up to the original starting position. Repeat this movement for the desired or prescribed number of repetitions.
DO
DON'T
Perform this exercise in a smooth and fluid motion
Don't lock out your arms at the top
SPECIAL NOTES & LEVEL of DIFFICULTY VARIATIONS
To increase the level of difficulty, slow down the movement or cross your legs at your ankles.