That hand towel you keep with your workout gear is for more than wiping the sweat off your brow — it can be an amazing fitness tool. That is if you know how to use it. Join us in this 20-minute strength-training session and we will teach you how to use your towel like a glider to challenge your abs and legs. If you're working out on carpeting, grab a paper plate instead, press play, and get ready to slide and glide your way to stronger abs and legs.