Gear to track the data with is not cheap as Lincoln Eppard notes. Garmin watches can go for a few hundred dollars and that’s just the start of it. In order to track the swimming and running date, the athletes use heart rate monitors to tell them when they are working to hard or not hard enough. The goal is for it to be at the peak heart rate level. To track the power output from cycling, a gadget called Power Tap is place in the pedal. This tells you how much power in watts you are generating. They also wear a cadence monitor while running to tell them their steps per minute. With all this they know when and where to push themselves to gain maximum results. Eppard says the numbers don’t lie and that it prevents the mind game of thinking you are tired when you actually aren’t.