By: Owen Anderson 

Wetsuits Triathlon: If you're a triathlete, you've got to like wetsuits. They keep frigid water from paralyzing your arm and leg muscles and sinking your ship before you make it to shore, and they can improve swimming speed by 3 to 7 per cent, enough to give you a 50- to 100-metre edge over a suit-less competitor in a 1500-metre swim.