If you're looking to burn fat or build muscle there's a great new website for daily fitness deals its called Fitness Rebates. They offer fitness related coupons & deals on supplements, treadmills, ellipticals, workout DVDs, ebooks, & more.
They just recently released Fitness Rebates apparel as well. You can find their shirts and hoodies on eBay.
http://www.FitnessRebates.com
http://www.facebook.com/fitnessrebates
http://www.twitter.com/FitnessRebates