1. No problem with the sit-up, in fact the explanation offered in this article is a crunch not a full sit up which won't place excessive stress on the lumbar spine.
2. Our bodies are build to move, lift, bend and squat. We should be able to squat fully, lift weights to our shoulders (if not too heavy) and press our own body weight up. It's just that 21st century lifestyles prevent the majority from using these capabilites fully, thus we lose the ability to do so. No dangers of injury if done progressively.
3. The knee press up for those with weakness in arms, chest and shoulders is a good alternative. I'd prefer to teach this then move to the partial pressup progression.
Posted: 26/11/2009 at 19:59