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Get fit outside.




Forget the gym. Go outside and get in shape with a workout that is,literally, a breath of fresh air! In Fit by Nature John Colver, founder of fitness company adventX, lays out his flagship 12-week outdoor training program.


Starting with seasonal advice on how to effectively utilize the outdoors, John leads you toward a healthy, fit lifestyle. Run up neighborhood stairs, jump over logs on a nearby trail, swim at a local aquatic park, or stretch in your own backyard: John matches your skill level and goals. With this unique and positive 12-week program, you will learn how to integrate simple exercises into your daily routine, explore the community in which you live, create a sustainable approach to your fitness life, and appreciate your outdoor world in new ways.


Fit by Nature will push you to a new fitness level- and change your life!


Features to get you started and keep you on track:

  • John's exclusive "Daily Dozen" and "Home Stretch" routines
  • Training in phases: adapt, build, peak
  • Smart nutrition and injury prevention
  • Goal-setting and inspiration
  • Gear advice and choices
  • Measurable milestones week-by-week across 12 weeks
  • Weekly charts and day-by-day descriptions
  • Sport-specific circuit training
  • adventX On-Target Fitness Questionnaire
  • Full-color photo digest of all core exercises


No matter where you live, you can get fit and have fun in the great outdoors!


Award-winning athletic coach, mountain guide, and former competitive cyclist John Colver is the founder of adventX, an outdoor fitness company based in Seattle. He has personally trained more than 600 clients, from novice exercisers who want to feel more healthy to elite athletes who have run in 100-mile races, competed in cycling and triathlon events, and summited Mount Everest.


M. Nicole Nazzaro is a widely published sports and fitness writer who has written for Sports Illustrated and American Track and Field.

Fit By Nature

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