A PilAtes bAll> Piskin recommends the Stott Pilates Seven-Inch Mini Stability Ball ($9, stottpilates .com). Don’t have one? Any medium-size, semihard ball (around the size of a soccer ball) will do.

You’ve probably read about celebs extolling thevirtues of Pilates (lean legs, a supertaut tummy!), or maybe even heard the hype from mat-class–obsessed friends. If you’re still skeptical, keep reading: “Pilates puts your muscles—especially the smaller, stabilizing ones—under constant tension over a large range of motion to create that enviable long, lean look,” says Lauren Piskin, owner of Physicalmind Studio in New York City. What’s more, one study found that women who swapped their usual routines for two 60-minute Pilates sessions a week saw significant increases in abdominal endurance, hamstring flexibility, and upper-body muscular endurance.

Problem is, these perks often come with a hefty price tag: A few sessions a week (typically using a bed-size contraption called a Reformer) can set you back hundreds of dollars. So Piskin created this at-home total-body workout, which gives your abs some extra love without damaging your bottom line. All you need is a Pilates ball. “The ball mimics the resistance of the machine to challenge your muscles as you move through fluid movements,” says Piskin. Do the following sequence two or three times a week. Starting with the first move, do eight to 10 reps of each exercise with little to no rest between exercises.

Mermaid with Ball Sit with the ball at your left side, and bend your left leg in front of you, your right leg behind you. Place your left hand on the ball, elbow slightly bent, and extend your right arm out to your side at shoulder level (a). Brace your core and roll the ball out to the left as far as you can while reaching your right arm over your head (b). Hold for two or three seconds,then roll the ball back toward your body and return to the starting position. That’s one rep. Finish all reps, then switch sides and repeat.

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Focus on form and control through each move for the sleekest results.Body Language Sportswear bra, Zobha leggings

Flat-Ab Pilates Get a tighter tummy at home, thanks to this innovative workout.By Je n Ato rp h o t o g r a p h s B Y C h r i s s h i p m a n

1 w o m e n ’ s h e a lt h / womenshealthmag.com

Quick TipAs you roll down, think of your spine as a string of pearls. Lower your body one pearl at a time until the biggest pearl (your head) touches the floor.

Rollover Lie faceup on the floor or an exercise mat with your arms at your sides, palms down, legs straight. Lift your legs until they’re perpendicular to the floor, feet flexed (a). Keeping your shoulders relaxed and legs straight, brace your core and raise your hips, slowly reaching your legs behind your head as far as you possibly can and pointing your toes behind you (b). Slowly reverse the movement to return to start. That’s one rep.

Roll Back and Up Sit with your legs extended straight out in front of you, feet flexed. Hold the ball in front of you at shoulder level, arms straight. Keep your chest up and back straight (a). Contract your core and glutes, then slowly roll back until your back is flat on the floor and the ball is directly overhead (b). From that position, bring your chin to your chest and slowly roll back up to the starting position. That’s one rep.

Coordination with Ball Lie faceup with your hips and knees bent 90 degrees; hold the ball with both hands, arms straight. Bend your elbows and lower the ball toward your chest, pressing your hands firmly against the ball (a). Brace your abs, extend your arms in front of you, curl your shoulders off the floor, and straighten your legs (b). Hold for one or two seconds, then reverse to return to start. That’s one rep.

Swan on Ball Lie facedown with your legs extended shoulder-width apart behind you. Position the ball under your chest and rest your forearms on the floor, palms down, elbows close to your body (a). Bring your shoulder blades back and down, press your palms lightly on the floor, and slowly lift your head and chest as you lengthen your spine (b). Hold for two or three seconds (imagine trying to create as much space between your ears and toes as possible), then return to the starting position. That’s one rep.

Back Arm Rowing Sit with your knees bent and feet flat on the floor about hip-width apart. Extend your arms straight in front of you, palms up. Your back should be straight, your chest up (a). Brace your core, curl your tailbone under, and slowly lower your upper body to a 45-degree angle. At the same time, bend your arms to bring your elbows close to your body, closing your hands into fists and pulling them toward your shoulders at eye level (b). Pause, then reverse the motion to return to start. That’s one rep.

Mermaid with Twist Sit on your left hip with your left leg flat on the floor, knee bent 90 degrees, and your left palm on the floor. Bend your right knee toward the ceiling and place your right foot flat on the floor in front of your left foot; rest your right arm on your right knee (a). Shift your weight onto your left arm and straighten both legs to raise your hips toward the ceiling while extending your right arm directly over your head (b). From this position, twist your torso down and to the left, reaching your right arm underneath your body (c). Reverse the movement to return to the starting position. That’s one rep. Finish all reps on that side, then switch sides and repeat.

Quick Tip Keep your core engaged throughout the movement to prevent putting pressure on your lower back.

Footwork on Ball Lie faceup, arms by your sides, palms facing down. Bend your knees and place the balls of your feet on top of the ball, heels together and toes pointing slightly outward in a small V shape (a). Engage your core and contract your glutes to lift your hips an inch off the floor, then roll the ball away from you until your heels are on the ball (b). Pause, then bend your knees to roll the ball back to the starting position. That’s one rep.

Quick TipKeep your feet off the floor throughout the move, and reach back only as far as you comfort-ably can.

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