Work Your Core

A stronger core will make you a better runner. That's because scientists and coaches now know that you can't run your best without a strong core, the muscles in your abdominals, lower back, and glutes. They provide the stability, power, and endurance that runners need for powering up hills, sprinting to the finish, and maintaining efficient form mile after mile. "When your core is strong, everything else will follow," says Greg McMillan, a running coach in Flagstaff, Arizona, who has worked with scores of elite and recreational runners. "It's the foundation for all of your movement, no matter what level of running you're doing."

Add a little corework to your routine. Pilates are easy on yoru body, strengthen the diaphragm, stretch tight muscles, and improve posture to help you run with less effort. This link from Runner's World can get you started on a stronger core: http://www.runnersworld.com/article/0,7120,s6-238-263-266-12996-0,00.html