Here's a Week's Worth of Belly-Fat-Busting Workouts
These quick routines will help whittle your middle.
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WORKOUT 1
High Knees
Run in place, bringing your knees up high and pumping your arms.
Mountain Climbers
Get in a plank position, with your feet hip-distance apart. Pull one knee in toward your chest and continue to quickly alternate knees while keeping your upper body in a steady plank position—don't let your lower back sag toward the ground.
Make it harder: Do a cross-body mountain climber, bringing your knees across your body as though you're trying to touch your opposite elbow.
Lunge with a Twist
Lunge forward, bending your front leg to 45 degrees and keeping your back leg straight and your back flat. Your hands should be in front of your chest in prayer position. Twist from your core and reach your hands toward the outside of your front foot. Rise back to starting position and repeat.
Front/Back Frog Hops
Stand with legs slightly wider than shoulder-width apart; squat down, pushing your butt out behind you, and touch the ground between your legs. Then hop up and forward, repeat the squat-floor touch, hop up and back and repeat. As you're going through the move, don't let your back arch or round when you try to touch the floor in the squat. Hinge forward from your hips instead.
Make it easier: If this is too hard on your knees, take the hop out and simply squat, touch the floor and repeat.
Bicycle Crunches
Lay on your back with your legs straight and your hands behind your head. Raise your legs so your feet hover just above the floor. Bring one knee up and in toward your chest, lifting your shoulders off the floor and twisting your torso so your opposite elbow and knee meet. Alternate side-to-side. Your lower back should feel glued to the floor. If you feel it starting to arch, lift your legs higher off the floor.
High Knees

Run in place, bringing your knees up high and pumping your arms.
Mountain Climbers

Get in a plank position, with your feet hip-distance apart. Pull one knee in toward your chest and continue to quickly alternate knees while keeping your upper body in a steady plank position—don't let your lower back sag toward the ground.
Make it harder: Do a cross-body mountain climber, bringing your knees across your body as though you're trying to touch your opposite elbow.
Lunge with a Twist

Lunge forward, bending your front leg to 45 degrees and keeping your back leg straight and your back flat. Your hands should be in front of your chest in prayer position. Twist from your core and reach your hands toward the outside of your front foot. Rise back to starting position and repeat.
Front/Back Frog Hops

Stand with legs slightly wider than shoulder-width apart; squat down, pushing your butt out behind you, and touch the ground between your legs. Then hop up and forward, repeat the squat-floor touch, hop up and back and repeat. As you're going through the move, don't let your back arch or round when you try to touch the floor in the squat. Hinge forward from your hips instead.
Make it easier: If this is too hard on your knees, take the hop out and simply squat, touch the floor and repeat.
Bicycle Crunches

Lay on your back with your legs straight and your hands behind your head. Raise your legs so your feet hover just above the floor. Bring one knee up and in toward your chest, lifting your shoulders off the floor and twisting your torso so your opposite elbow and knee meet. Alternate side-to-side. Your lower back should feel glued to the floor. If you feel it starting to arch, lift your legs higher off the floor.