Military Push Ups
Position yourself by placing your hands and toes on the ground, and keep your arms and back straight. Keep your hands a little more than shoulder-width apart and constrict your abdominal muscles. Next you will have to breathe in and out while doing the exercise. Inhale when you lower your upper body to the ground, and stop as your elbows make a 90-degree angle. Make sure you do not touch the ground. Exhale and return to your initial position. Do not lock your elbows, and keep your back straight, as in do not bend it while pushing yourself away from the ground. Perform this routine several times and divide it by sets.
Modified Push Up
This is different from the above mentioned push ups. Now you will need to place your knees and hands on the ground. Make sure your abs and gluts are stiff, your back should be in one diagonal position with your neck and head. Keep your feet off the ground and lift them. Inhale your breath as you lower yourself to the ground. Then stop when your elbows make a 90-degree angle. An important part of this exercise is to prevent your body from coming in contact with the ground. After this, exhale and push yourself away from the ground. Do not lock your elbows, and do not tilt your back. Do this multiple times in sets.