Interval training in the pool is a great way to exercise and give your body a break from your regular workouts, running and stress on your muscles. If you're a swimmer or triathlete, here's a interval swimming workout to try.
Good work out for getting back into shape for life guarding. 1500 m/yd swim - repeat at least week, plus 500 yd continuous swim, treading with bricks, and surface dives. Gonna have to work my way up to this