As you bend your knees, curl ... left foot directly under your left hip. Step up, straightening your right leg, bringing both feet completely onto the bench. Slowly bend your right knee, lowering ...

Step to the right and sit down and back into ... Then, with force, bring the right knee through center and up toward your chest as you jump on your left foot landing with a slightly bent leg.

The following 6 moves will help tone and slim your abs from every angle—no sit-ups in sight ... Shift weight to right foot and contract left side of torso, lifting left knee out to side.

Hold a dumbbell in the right hand, hands at sides. Step up with right foot onto box, then drive the left knee up toward the chest so hip and knee form a 90-degree angle. Step back down.

But if you’re looking to build muscle, boost your range of motion, and start your workouts off on the right foot (read ... Transfer weight to left leg as you drive right knee up to hip height.