How to do push-ups properly
The proper way to do a pushup is to start off of your hands and knees and then go into the full upper plank position. From there you will be as straight as a board - and superstiff. The width of your feet determines the difficulty of the pushup - i.e. the wider apart the easier it is because of the base distribution (it's all engineering in the end). Now, to get the most out of the pushup you don't just come down and up like a buoy in the ocean. You "spiral" the shoulders back and down to engage the latissimus dorsi - AHA!! You see that's the key to getting a bigger bench or dumbbell press too!! That's the McGill factor. Right off of his new video (which features Shane Carwin and GSP). So, you spiral the shoulders back and down to engage the lats and then you superstiffen (keep the abs braced like someone is going to punch you) the entire body as you rapidly ascend. That's a push-up.