T.J. Davenport pulls his way to the top of a 100-foot oak during a recreational tree climbing course at Camp Wyman in Eureka, Mo., last month. Such climbs offer good full-body workouts, advocates say.
What's Your Workout: Tree Climbing Ann Koenig is an urban forester for the Missouri Department of Conservation. In her downtime, she's up in the trees -- as a competitive tree climber.
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