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To prevent injury, you should stretch before doing this exercise. Stretching will loosen your muscles and enable you to do this exercise more fluidly.  Start stretching by standing up, with your feet spread shoulder length apart. Then, bend to touch your toes on each foot, and hold for 10 seconds. Alternatively, you can stretch sitting down. Sit on the floor with your legs spread, similar to a V position. Reach for your toes on the left foot, right foot, and then reach as far as you can in the middle, and hold for 10 seconds. To start the Hindu push-up, get into a normal, starting push-up position. With your knees bent and touching the ground, place your hands on the ground directly under your shoulders (your arms should be straight). Then, slowly remove your knees from the floor and dig your toes into the ground to stabilize the lower half of your body. You should be in a high plank position.  For beginners, place your hands and feet a little farther than shoulder-width apart.  More advanced trainees can keep their hands and feet closer together for a more intense workout. Once you are in the starting push-up position, begin to raise your backside up into the air. As you raise your backside into the air, keep your arms, legs, and back straight. At this point, your eyes should be looking at your feet. In this position, you will look like an upside down V. This V position is essentially the starting position, and you will return to this position after you complete each push-up.

Summary:
Stretch before doing the Hindu push-up. Get into a starting push-up position. Raise your backside into the air.