Athlete tent gives druglike boost: "All athletes dream of reaching great heights - but in a minivan? Top US mountain biker Carl Wecker says his first mentor used to drive up to the top of a nearby mountain every night and sleep in his car to get the endurance benefits associated with high altitude. 'It's not too big a price to pay when you're training hard,' says the Oregon native and four-time participant in the mountain biking world championships. 'It just sounds weird.' Today, Mr. Wecker has a more convenient solution: an altitude tent, which simulates thin mountain air right in his bedroom."