Photos: Fitness gadgets of the future?

SaunaLite says that among other benefits, cells exposed to certain wavelengths of near-infrared light produce more energy to power the muscles. If you exercise while exposed to near-infrared, the company says, you increase metabolism and burn more calories while having increased energy.

SaunaLite also says mild warmth from the system stimulates nitric oxide to dilate the microcirculatory system, meaning more blood and oxygen flows to the muscles without increasing blood pressure.

People testing the system at the treadmill at the IHRSA show got sweaty from the heat. How much of any resulting weight loss comes from water loss the company did not say.