25 MINIUTE WITH MIGHTY MACHINE ROUTINE

Consider the rower your badass-yet-friendly trainer. With each stroke, you melt fat and firm up everything from your shoulders to your calves-but because you're cardio. Plus, the movement helps create posture your mom would be proud of. Although you're rowing with your arms in front ofyou, it's a great counteraction to the hunched-over position many of us are in all day. Your back needs to stay rowing strengthens back muscles that get weakened from desk jobs. The best part: The faster you row, the more intense your workout becomes—so the quick intervals here will get you toned in less time.