I just got invited to a four-day hiking trip around Aspen, Colorado, early this fall (while the aspen leaves are bright yellow, I've been told). I'm excited about the trip, but I'm from Missouri so I'm worried about the altitude. Is there anything I can do to prepare for four days of hiking at 9,000+ feet of elevation? Carl T. Missouri

Want a spin bike delivered to your room? Get that and more with our guide to staying fit on the road.

Ready to play your way to total fitness? We thought so. Kick-start your transformation with a visionary six-week approach to bringing body and mind together for strength, stamina, and your best performance ever.

For a compulsive adventurer who can't stay put, sometimes there's only one cure: Get Zen. If only it were that easy.

YOU CAN BET that drug-company executives aren’t among the 70 million Americans suffering from sleep problems. Thanks to blockbusters like $2-billion-a-year Ambien, the sleep-aid industry is booming, and several similar drugs are angling for space in your medicine cabinet, including Lunesta, launched in 2004, and others awaiting FDA approval. These…

I'm a 45-year-old male who spends most of the day at a desk. I exercise four days a week in the morning with either a 2.5-mile run, a 50-minute trip to the gym (treadmill and machines), or simply a half-hour of yoga stretches. How much exercise is really enough? If I didn't have a job and kids I'd spend more time being active. Thanks. Steve Denver, Colorado

Because every second you’re not living life to the fullest is an opportunity missed—and the clock is ticking. To get you going, we’ve handpicked a no-regrets, full-throttle, see-the-world list of 50 things to do before you die—from climbing an 8,000-meter peak to making the perfect martini. Pro surfer Kelly Slater…

When work and fitness are combined, how do you keep yourself from burning out and maintain a medium balance? Derry East Wemyss Fife, Scotland

Got the whole make-fitness-fun thing? Now let's talk about that mortal coil of yours. You think you know it, but you don't know Jack.

Fit should be synonymous with fun. So stop working out and start acting like a kid again. With help from fitness experts, pro athletes, and groundbreaking coaches, we'll show you how playing your favorite games leads to a lifetime of high-energy health.

Sore and suffering after a long day? Flush away the pain and restore your mojo with these eight feel-better tools.

Travel can be a minefield of fatigue, jet lag, strange food, and fitness regimens shot to hell. It doesn't have to be that way. With our road-warrior plan, you can fight back—and win.

Does wilderness therapy help troubled kids? After a gang of teenagers staged a violent mutiny in the badlands of Utah, we joined the search for answers.

A corps of rock rats in a hurry is putting the pedal to the mettle in big-wall climbing