MUSCULAR CHRISTIANITY
The Economist carries an article on the gym movement as an attempt at puritanical religious experience.

"To anthropologists of the future, however, the gym boom may look as much like a sinister cult as a commercial triumph. Gym-going, after all, has all the basic lineaments of a religion. Its adherents are motivated by feelings of guilt, and the urge to atone for fleshly sins. Many visit their places of worship with a fanatical regularity: a third of LA Fitness members, for instance, go virtually every day. Once there, believers are led by sacerdotal instructors, who either goad them into mass ecstasy during aerobics classes, or preside over the confessional tête-à-tête of personal training. Each devotee has his own rituals, though most rely on the principles of self-mortification and delayed gratification. The extremist cult of body-building, whose Mecca is Gold's Gym in Venice, California, has become a mass movement."

Speaking of religious aerobics -- I spent the morning cutting the grass around our church building. No need to visit the gym.