The 20 Minute All-In-One Workout

Lateley I've been using a very fast workout that allows me to do 3 things in 20 minutes:
- 250 pushups
- 20 minutes of cardio (interval)
- Ab contractions

Here's how it works:
I leave my house on foot to warm up for a 20 minute jog. During a 2 minute warm up walk, I practice thirty second ab contractions. To do this I just suck in my stomach and hold it in an isometric contraction for 30 seconds (while walking). I continue to breathe in and out during the ab contraction, each time attempting to suck in my stomach even more. After 2 minutes of walking, I'm warmed up and ready to start.

I hit "start" on my stopwatch and drop to the sidewalk to start a set of pushups. When done, I stand up and take off running. After running for about 1-2 minutes, I drop to the sidewalk again and do my second set of pushups. I continue to do this while running until I get to 250 pushups and usually end my run right at 20 minutes. During the pushups, I also contract my abs powerfully and keep my back straight to get a good ab workout.

What I love about this workout is that it's fast and very efficient. Also, because the 20 minutes is a mix of cardio and strength training, I get the added benefit of varying my heart rate. You can do the same type of workout using a cardio machine instead of running if you wish. If you're short on time, give this workout a try.