Situp with Punch

Total-Body Stress-Buster Workout - No time for hour-long exercise? No problem. Here is one amazing workout that takes just 15 minutes. It can be completed without sacrificing much of your precious time. Plus, they don't require much equipment, so there's no need to even set foot in a gym; you can do them anywhere. Perform as many reps as you can in 60 seconds, then move to the next exercise and so on. After completing all seven moves back to back, rest for 60 seconds, then repeat the circuit.

Situp with Punch - Lie on your back with your knees bent, your feet flat on the floor, and hands behind your head. Brace your abs, sit up, and punch across your body six times with your left arm. Return to the starting position, sit up, and punch across your body six times with your left arm. That is one rep.

Source: Men's Health