1 of 21
KHLOE, KOURTNEY & KIM KARDASHIAN
Reality TV’s sweetest sisters keep fitness in the family as they get in a little exercise on the Santa Barbara boardwalk – in typical Kardashian style. and Khloe worked in some aerobic activity by rollerblading, while ready-to-pop Kourtney walked alongside her sisters. And squeezing in some safe exercises are a smart move for the expectant star: Recent studies show that maintaining a healthy weight while pregnant is great for moms and their unborn babies, according to Health.com.
2 of 21
Stretching before you run is one of the best ways to prevent injury. No wonder Gossip Girl’s Jessica Szohr, (dressed in perspiration-wicking Under Armor gear) kicks off an intense jog around the Big Apple with a long warm-up routine that maximizes her workout. Check out the best ways to stretch at Lance Armstrong’s livestrong.com website.
3 of 21
JILL ZARIN & KELLY KILLOREN BENSIMON
Cupcakes and a shapely rear? The two don’t usually go hand-in-hand, but when the Real Housewives of New York City hit N.Y.C.’s sidewalks for a brisk walk, Kelly indulged as she strolled. The duo kept the extra calories from going straight to their bums by wearing Reebok’s butt-building EasyTone sneakers, which rely on specially designed balance pods built into the shoes that forces muscles to adapt and work harder.
4 of 21
The onscreen shows off her fighting shape in her hot pink shorts and simple black Under Armour tank while hiking L.A.’s Runyon Canyon. And she’s sure to burn plenty of calories: Adding an incline to your walk or jog immediately pumps up the aerobic benefits and the calorie-burning potential.
5 of 21
Refueling after a workout can be as important as picking out cute workout clothes, like red and black Reebok outfit. Coconut water is a natural alternative to sports drinks, containing not only water for rehydration but also electrolytes and carbohydrates to replace what burns off while exercising.
6 of 21
The Real Housewives of New York City star takes advantage of the city’s great green space – Central Park! – as she rollerblades in easy khaki shorts and a white tank top.
7 of 21
The Hills star shows off her toned arms in a patterned Vitamin A halter cover-up for a game of beach tennis in Malibu. To stay in beach-ready shape, Cavallari works out with trainer Eric Paskel. “Her goals are to define her arms, particularly her triceps and shoulders,” says Paskel, who taught her the alligator push-up. “Start in a plank pose and lower down, just hovering above the ground and using hand and feet, walk yourself forward three steps and three steps back. It hits the triceps in a way gym equipment can’t.”
8 of 21
To hit the links in Toluca Lake, Calif., avid golfer Justin Timberlake makes sure he looks sharp in a Ralph Lauren Big Pony Polo shirt and plaid shorts. Besides being an opportunity to get outdoors, golfing is actually a cardiovascular and total-body workout that can help strengthen the core (arms, legs and shoulders). And a typical 18-hole golf course is five miles, so forget the cart and get walking!
9 of 21
Dressed in a loose long-sleeved top and stretchy capri pants, Renée Zellweger shows off her form during a jog in Los Angeles. The actress is also a fan of spinning: When Zellweger is in town, she attends classes at East Hampton, N.Y., gym ZoneHampton. Spinning is an effective workout to build leg muscles (and tone your butt!) as well as strengthen your heart. Plus, the average person burns 500 calories in a 45-minute class.
10 of 21
Gavin Rossdale is serious about his tennis game – and looks the part with his headband, bright T-shirt, white shorts and requisite sweatband. “What I like about it is it’s a battle against yourself,” says the rocker. “It’s incredibly physical yet it takes pure form. It’s about balance, poise and economy of movement to get the most power.”
11 of 21
Outfitted in a funky polka-dot tee and shorts, Fergie makes sure she has her headphones at the ready during a workout in Los Angeles. To stay hydrated when she’s exercising, the fitness buff is a fan of Activate, a purified water infused with a vitamin and mineral blend.
12 of 21
A glam Kim Kardashian flaunts her curves in a body-conscious spandex ensemble while showing off her fitness moves at a promotional event for her Fit In Your Jeans By Friday exercise DVD series at the Sierra Mist Beach House in Malibu. “This workout is challenging but fun,” says the reality star about the exercise videos, which target the core, abs and butt. “I just hope that my DVD can be the jumpstart that people need to get motivated and healthy!”
13 of 21
With a cute canvas tote in tow, Reese Witherspoon – in a Nike tank and stretch capris – leaves a Pilates class in Brentwood, Calif. The actress has also been working up a serious sweat honing her pitching skills in the movie How Do You Know? Talk about a calorie-burner: one hour of throwing the ball shaves over more than 350 calories!
14 of 21
Helmet? Check! Gloves? Check! Biking shorts? Check! Jake Gyllenhaal is in pro cyclist mode during a spin with a pal around Santa Monica. To stay in shape, the buff actor has also done couples yoga with girlfriend Reese Witherspoon at Santa Monica’s Yogahop studio.
15 of 21
16 of 21
A pretty-in-pink Ashley Tisdale goes for a layered look with a Nike tank, spandex mini and Nike capris, while leaving a gym in Sherman Oaks, Calif. The High School Musical star does “a lot of cardio with my trainer” but sticks to light weights to avoid getting bulky when she works out. She also loves doing the Wii Fit!
17 of 21
Ali Larter adds a designer dash to her Nike tank and capris with a Louis Vuitton clutch after a workout in West Hollywood. The actress got her body wedding-ready for her Aug. 1 nuptials to fiancé Hayes MacArthur by going to the drill sergeant-style Barry’s Bootcamp classes, which include strength-training exercises with resistance bands, treadmill work and challenging floor exercises for a total-body workout.
18 of 21
JESSICA BIEL & JUSTIN TIMBERLAKE
Sporting hers-and-his caps and windbreakers, Jessica Biel and Justin Timberlake rev up their romance with a jog through New York City. A fitness date is a perfect way to celebrate your togetherness and challenge each other to meet goals!
19 of 21
Expectant mom Ellen Pompeo, in a spandex tank and matching capris while out in Beverly Hills, isn’t slowing down her fitness routine during her pregnancy. The Grey’s Anatomy star’s focus is building endurance during her workouts with trainer Gregg Miele. That’s smart: Moderate exercise is a great way to relieve back pain and prepare you for the challenges of childbirth, according to Health.com.
20 of 21
Hilary Swank hits the ground running in Brooklyn, N.Y., wearing Calvin Klein Performance fitness gear and an Incase sports armband for her iPod nano. Perfect for tuning in on the go, the neoprene case straps on and turns your music player into a workout companion. It’s the perfect accessory for the actress, who’s also a big fan of spinning!
21 of 21
Pussycat Dolls singer Nicole Scherzinger makes waves in a sassy striped bikini while paddle-boarding in her native Hawaii. Jennifer Aniston, Courteney Cox Arquette and Jennifer Garner have also dabbled in the sport, which is a total-body workout that targets building a strong core.
Beyoncé Shows Off Her Toned Abs (and Ivy Park T-Shirt) in New Set of Fashion Instagram Photos
Kourtney Kardashian and Larsa Pippen Show Off Their Super-Toned Abs in Crop Tops
Justin Bieber Shows off His Massive New Torso Tattoo — and Fans Are Going Crazy
Gigi Hadid's Been Secretly Wearing Her Maybelline Makeup Collection for Weeks - Even Bella Didn't Know!
Hannah Montana Actor Mitchel Musso Reveals He's Still Ashamed of His Character's Fashion Choices in Hilarious Tweet