When most people think of getting in shape, they immediately think of gym memberships-treadmills, stairmaster machines, rooms crammed full with both equipment and people. Sometimes it makes you think, "Wouldn't it be nice to have a workout that was a breath of fresh air?"That's exactly what John Colver, the award-winning founder of Seattle-based training company AdventX, has been teaching for nearly a decade. In The Nature of Fitness, he lays out his flagship 12-week outdoor training program-a regimen that requires nothing more than outdoor space. Starting from the basics such as nutrition, seasonal advice, and injury prevention, to how to make outdoor fitness a part of your lifestyle-with suggestions on goal-setting, gear lists, and staying inspired-John leads you into his 12-week program. With daily charts and detailed day-by-day descriptions, this book will have you pushing to a new fitness level by running up your neighborhood stairs, doing laps at your local aquatic park, and even just doing stretches in your own backyard. Appendices include a compendium of all exercises, sport-specific circuit training, and an AdventX On-Target Fitness Evaluation.Forget the gym. Go outside-not only will you get in the best shape of your life, but you might even enjoy the experience.