An aerobic exercise done in water?
Swimming is the main aerobic exercise done in water. Many people
disagree with swimming as a form of fitness improving/fat burning
exercise, when the truth is it is very effective. Exercise
intensity is measured through oxygen consumption, and this is a
requirement in swimming.
Waterpolo is another sport which requires high fitness, however
this is broken down into muscular fitness when treading water and
rapidly stretching for the ball, and aerobic fitness for swimming
into spaces or towards the ball.