try these pushups:
a) To concentrate on the back, you want your hands at an even level with your shoulders but placed farther apart (6+ inches).
b) To concentrate on the chest, positon hands beneathe shoulders with fingers pointing towards eachother.
c) To concentrate on the triceps, position your hands directly below your shoulders. When lowering yourself, focus on making your elbows bend towards your
feet and not out to the side.
*to make it intense: when you lower yourself two inches above the ground.......hold the position for ten seconds