if you do 1 workout, it had better be this /

Build muscle and blast calories with this effective bodyweight workout. And it's excuse-proof,too, because you can do it anywhere since it requires no equipment at all. The workout should take you around 20 minutes, or so score moving!Directions: Start with 10 reps of each exercise,building up to 15 reps of each lunge as you score stronger.
Here's a printable version of this workout. Now you really contain no excuses!Related:
CrossFit-Inspired 200-Rep Bodyweight Workout

Source: popsugar.com