As it is implied by my username, I swim here at IHS. I have been swimming competitively for almost 15 years now since the age of 3 and can now explain the sport in terms of physics and not just times, numbers, and countless abbreviations they will never remember. Once in the water, every motion you make pushes on the water and because of Newton's third law of motion states, every action has an equal and opposite reaction. For every kick, stoke, shimmy, and turn I am being pushed forward by the water with the same force that I apply to the water. This may explain why Deb always tell Jack to kick more. The more frequent he kicks, the more force he applies during a race and faster he goes. Maybe he should just listen and actually kick. Newton could have told him almost 300 years ago.