PLANK UP-DOWN
Start in a pushup position, hands under your shoulders and body in a straight line (a). Lower onto your right forearm (b), then your left forearm (c), keeping your hips as still as possible. Reverse the movement to return to start. That’s one rep; do 30, switching the order of your arms as you go.
Lie on your back with your legs extended and feet separated more than shoulder-width apart (a). Place your hands behind your head, then lift your shoulder blades off the floor to curl into a crunch, keeping your lower back on the floor (b). Reverse the movement to return to start. That’s one rep; do 30.
Trying to get flat abs? If you’ve got a dumbbell on hand, you can do some of these moves:
For more fitness advice, check out the April 2017 issue of Women’s Health on newsstands now.