If you only have 20 minutes, try this quick yet effective routine.

The Workout: Attack this 6-move power-boosting superset below, in order, three times. Rest for only 1 minute at the end of each superset.

1. Jump Rope: 1 minute
2. Pushups: 30 seconds
3. Alternating side lunges with medicine ball chest presses: one minute
4. Hip Raises: 1 minute
5. Kettlebell Swings: 30 seconds
6. V-Up crunches: 30 seconds