We'll have five exercises, which you'll do for 45 seconds each. Then, there will be a 15 second rest in between. We'll go two rounds for a total of 10 minutes. Throughout the video, I'll offer modifications for moves to make them a little easier or a little harder. Pick variations of each exercise that match your fitness level and how your body feels today.

To get the most out of this 10-minute abs workout, it's going to be important that you maintain tension in your core the entire time , so try not to fully relax your muscles at any point when you're doing an exercisesave that for the rest period. This workout is designed for you to get as many reps as possible within a certain timeframe, so stay focused and give it all you've go for the short amount of time you're doing each move.

Time: 10 minutes

Equipment: Mat

Good for: Abs

Plank-Up How to: Place your forearms on the floor, elbows under your shoulders, and extend your legs behind you. Keeping your back flat, straighten your right arm and place your palm flat on the floor, directly under your shoulder, then repeat with your left arm so you're in a pushup position. Reverse the movement, lowering back onto your right forearm and then onto your left, to return to start. That's one rep. Perform as many reps as possible in 45 seconds. Take one minute of rest before repeating the circuit again from the top.