An efficient system, with strings attached

EZ-Run Belt: Elastic-cord device that helps you pick up your feet.

Likes: Trains you for a more rapid turnover (the most efficient way to run faster) by helping keep your feet off the ground and by limiting overstriding. Rubber stretch cords, which connect the belt and ankle straps, lift your heels toward your butt and make it harder to fully extend the leg forward. The elastic cords come in three strengths, allowing a progression from the green tubing to the stronger yellow and red tubing. Inventor Joe Sparks, an Ohio triathlon coach, recommends that the device initially be used for 10 minutes at a time, then removed for the rest of the workout.

Dislikes: Must wear long socks to prevent slight rubbing on the Achilles tendon area.

Price: $89.95. http://www.fitnesswithjoe.com .