Muffin Top-Less

The Circuit

• Burpees (squat thrust) :  This power move works the entire body and improves power, speed, agility, and endurance. Complete 60-90 seconds of this exercise depending on your fitness level. 
• Squat Jumps:  With primary focus on the lower body, these moves are a great way to add fire and intensity to your workout. The jump increases your heart rate and your blood pumping. You can hold a pair of very light weighs if you want to incorporate upper body training. If you have trouble with your knees you might want to avoid jumping while doing this exercise. You can still get a great workout in with the squats alone.  Complete 60-90 seconds of this exercise depending on your fitness level. 
• Plyo-Jacks: Like all plyometric moves, plyo- jacks are quick to increase your heart rate and challenge your body. These are similar to a jumping jack but there is an added deep squat. Complete 60-90 seconds of this exercise depending on your fitness level. 
• Mountain Climbers: This workout also works most muscles in your body with a large focus on your legs and core. This is an intense exercise that can be modified to challenge every fitness level. If you are just starting out, complete these very slow and increase your speed over time. Complete 60 -90 seconds of this exercise depending on your fitness level.
• Frog Leaps: This silly exercise move is a great way to end the circuit. It increases power and agility while strengthening your lower body.  Your endurance will increase over time if you keep this move within your exercise regimen. Complete 60 -90 seconds of this exercise depending on your fitness level.

Active Recovery

In between each of these intense moves, complete Pushups with Side Plank for 30 seconds.  This is known as an Active Recovery since it allows you to recover from the crazy cardio move that you’ve just complete while incorporating strength training at the same time.  Active recovery is a technique that should be utilized no matter the length of your workout. It keeps your mind and body engaged and causes you to burn more calories.

Take a Break

After you have complete all five exercises with the active recovery move in between each, take a 2 minute break and repeat the entire workout two more times. This workout will have you sweating and feeling great in no time.

Good overview of some circuit training exercises! For the full article:
http://caloriecount.about.com/burn-maximum-calories-minimum-time