How you can make exercise eco-friendly

-- Join D.C. Trash Runners. The next meetup of this litter-pickup running group is Saturday at 10 a.m. at the Woodley Park Metro station. http://www.meetup.com/DCTrashRunners.

-- Recycle your clothes. Atayne offers a take-back program for past-their-prime polyester tops from any company. Download the form at http://www.atayne.com, mail it with your shirt to Atayne (110 Marginal Way, No. 967, Portland, Maine 04101), and you'll score a $5 discount on your next Atayne purchase. Got old shoes? Donate them at Pacers (http://www.runpacers.com), the local running store chain, to support the Perpetual Prosperity Pumps Foundation, which helps rural African farmers.

-- Support green businesses. A $13 annual membership with Live Green (http://www.livegreen.net) gets you discounts at the area's most environmentally friendly spots, including several yoga studios, and you can get $10 off a membership to the Washington Area Bicyclist Association.