Fit Travel: Hiking the Grand Canyon Rim to Rim

http://www.mensfitness.com/leisure/travel/fit-travel-hiking-the-grand-canyon-rim-to-rim

 Train with long runs and quad workouts
The 24-mile trek is tougher on your body than most marathons and should be approached with the same respect. The big difference? There’s no quitting partway through if you’re injured. Any good marathon training program, including endurance runs of up to 20 miles, will get you into the cardiovascular shape you need to be in, and quad training is crucial. Lunges and squats will prime your legs for the miles of downhill you’ll face at the start as well as the grueling uphill miles at the end. Incorporate stair climbing and hills into your long runs and train in the heat, if possible.