Fitness enthusiasts have frequently reported that they experience less sickness than their sedentary peers.

The ability to perform a given sport or activity, whether it involves swinging a bat in softball or running 10Ks, invariably declines when the sport is abandoned for any length of time.

The popularity of walking as a fitness activity is growing by leaps and bounds. Low risk and easy to start, walking has proved its health benefits in numerous studies.

Data from the National Sporting Goods Association indicates that treadmills have been the number-one-ranked home aerobic equipment for the past three years.