This 15-Minute Workout Hits All Of Your Major

 whether because you're not sure what to do or because you think a 15-minute workout can't possibly be all that effective.

Well, I'm a firm believer that even just 10 or 15 minutes of movement is *ALWAYS* better than none. No, you may not be able to train for a marathon or burn a full spin-class-worth of calories, but you can put a dent in your fitness goals—and drastically improve your mood—with super-quick workouts.

After all, if you want to be fit for life, you've got to be flexible and willing to adapt to whatever schedule and lifestyle changes come your way. And, heck, sometimes ya just don't have the motivation to spend an hour sweating. I get it.

If you've got time for just a 15-minute workout and want to get the most out of it, you must, must, must limit your rest as much as possible in order to cram as many reps as possible. Which specific moves you do, though, depends on your goals.This lightning-fast high-intensity workout hits all of your muscles hard—and, best of all, requires zero equipment.

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