Between your job and personal obligations, squeezing in a workout can almost be as challenging as the actual sweat session — but don't throw in the gym towel just yet. There's a small window of time that occurs smack dab in the middle of your day that's perfect for a calorie burn: your lunch hour. But because we know you're busy, we've rounded up eight awesome classes that are guaranteed to make you feel a heck of a lot better than a burger and fries. Not only are you relieving some of that icky workday stress, you're getting fit and toned in the process. So, enough with the excuses. Pack that gym bag (and that healthy lunch) and get moving.