When you don’t have time: Do you have 10 minutes? We’ve got a workout for you. Too long? How about 4 minutes? We’ve got a workout for that, too. When you’re bored to tears on the treadmill:Time to try a class or two where you simply show up, you sweat, and you’re done. Here’s how to try Zumba, spinning, Pilates, ballet, or yoga. Or try our new Love Your Lower Body DVD in the comfort of your own home. Another option: these 14 walking workouts are perfect in the great outdoors.  When you don’t want to go back to the office looking all red and sweaty:These 3 simple tips will help you look less scary after a quick midday workout.  When you’re in pain: One of the best low-impact workouts around is, of course, swimming. But if you don’t have access to a pool, here are some land-based workouts that are easy on joints. When you just don’t feel like it:The couch can be pretty compelling. But these 31 ways to never skip another workout will help get you up and moving (hey, the couch will be there when you’re done).