Do you know how many glasses of water you really need each day? Or how often to break for water while exercising? Test your hydration knowledge with this WebMD slideshow. #webmdsweeps http://on.webmd.com/MZ2dCU
If you're up for a very tough workout that takes everything you've got, this high-intensity program may be right for you. Started by a former gymnast and gymnastics coach, CrossFit lets you pick from different “workouts of the day,” or WOD. You might run, row, or climb ropes and do lunges, squats, and other moves.