Why do we love circuit workouts? It's simple: they torch calories while building muscle. So we created this efficient full-body circuit that combines several exercises to work multiple body parts at once. And since you can easily do this workout in the comfort of your living room, it's excuse-proof, too. It takes about 20 minutes! All you need is a set of dumbbells between five and eight pounds. Even if you don't have weights, you can still give it a go.
Instructions: After warming up with light cardio for five minutes, repeat each three-exercise circuit twice, resting for 60 seconds after completing one round of an entire circuit.
Find the printable version here.
Source: POPSUGAR Fitness http://bit.ly/1PpPT20