Chances are, if you have time to sneak in a workout over the holidays, you'll have a small window of time in which to do it. So save time by going big — big muscles, that is.
One way to make the most of quick holiday workouts is by focusing on the big muscle groups, including your chest, back, glutes, and quads. The bigger the muscle, the more muscle fibers activated, which means you're burning more calories and boosting your metabolism.
Try doing squats, such as these dumbbell squats (above), which work the quads, hamstrings, glutes, and lower back. Other big muscle moves include chest presses, lunges, back exercises, and planks. Do you focus on large muscle groups for short workouts?