Stand with your back to a wall, feet hip-width apart and slightly in front of you. Lean back into the wall, and slide down like you’re sitting down into a chair. Your knees should finish above your ankles, bent at 90 degrees. Hold this position for 30 seconds.It’s called the "7-Minute Workout," but you really get maximum benefit from repeating the circuit at least three times.
Get into a "plank" position on the floor or mat, feet together with toes tucked under, hands planted flat below your shoulders. Slowly bend your elbows and lower your body toward the floor, as far down as you can go keeping back and hips level. Then press back up and repeat for 30 seconds. You can make this easier by resting your weight on your knees instead of your feet. To boost intensity, try resting your feet on a low bench or step instead of the floor.
Start with a basic crunch: Lie flat on your back, with your knees bent and feet on floor. Tighten your core. Press your lower back into the mat and reach toward top of knees. Return to starting position but keep core tight and repeat for 30 seconds.
Stand facing a sturdy chair or bench. Step up onto the chair or bench with your left leg, coming all the way up to stand on it with both feet fully. Then step back down and come back up, starting with your right leg this time. Do as many as you can in 30 seconds. Get your heart pumping!
Stand with your feet shoulder-width apart and toes forward. Bend your knees as you hinge at the hips, shifting them back and down like you’re about to sit in a chair. Lower yourself as far as you comfortably can, keeping most of your weight on your heels. Stand back up. Repeat for 30 seconds.
Sit on the front edge of a stable and sturdy chair or bench, and put your palms on the edge, fingers pointing forward or slightly toward you. Ease off the chair, supporting your weight with your heels and your palms. Slowly bend your elbows as you lower yourself toward the floor, then push back up. Repeat for 30 seconds. You can make this exercise more challenging by supporting yourself on one leg at a time.