The 150-200 a day is probably more of a self improvement/maintenance thing. I don't know of any classes where you are doing that many of a single exercise. In response to the OP, yes, it is important to keep your head and back straight and in line. The more you contort your neck, the greater the chance of strain or injury, and the less you work the muscles you intend to. Just an FYI for everyone, pushups work the triceps just as much if not more than they work the chest. Aodhan Agreed but i dont agree with the fact p.ups work the triceps more....its just not that black and white. The general rule is... wide-chest affected more normal, i.e...shoulder width apart-chest AND triceps, the overall thing. close spacing,or diamond hand-triceps more. By the way, yes it is a maintence thing but martial arts and training, doesnt just start and end in the gym or class. Anything you can add in your own time only gives you more of an edge, in my own humble opinion.