Make the Most Out of Cardio With These Expert-Recommended Core Exercises

Another all-four-muscles move, the classic ab bikes or bicycles will strengthen and tone.

• Lie on your back with knees bent, feet on the floor.
• Clasp hands behind your head, elbows out to the side.
• Bring both knees up into tabletop position (hips and knees bent to 90 degrees).
• Bring head and shoulders up and rotate right elbow to left knee while right leg extends out straight. Repeat on opposite side.
• Repeat 10 times slowly each side, 10 times quickly each side.