Targets: core and legs

Sit on the floor, arms out in front of you. With a straight back, lean back slightly and raise calves so they're parallel to the floor; hold.

b. Straighten your left leg, hold for one second, then repeat with your right leg. Continue alternating; do six to eight reps on each side.

Bing:Workouts to tone your whole body

More from Redbook

Follow Lifestyle (@MSNcaLS) on Twitter!