Body Working

Weekly Time Saved: 20 to 30 minutes

Not going to make that spin class? Ten minutes is all you need to effectively toast off 100 calories. The key is to pull off combination moves that raise your heart rate and tone your muscles.

Grab a set of weight (5 to 10 pounds) and follow this routine:

1) Lunge while pressing weights overhead (two sets of 15 repetitions).
2) Squats while doing bicep curls (two sets of 15 repetitions).
3) 10 pushups, 15 bent-knee lower ab crunches, 10 pushups, 15 oblique crunches, 10 pushups.
Then hold your body in plank position for 30 seconds.