YOGIS

Celebrity fan Madonna practises ashtanga yoga, a style that focuses on the breath as well as the standard series of postures. She practised hatha yoga in earlier years and while she was pregnant, but switched to ashtanga and now practises daily. Ashtanga is a much speedier version than hatha and helps to build stamina.

Although Eva Longoria Parker has taken up kickboxing to stay fit, she remains a devoted yogi. She combines two sessions of yoga with three one-hour personal training sessions per week.

Reese Witherspoon also manages to drag boyfriend Jake Gyllenhaal along to her private yoga classes and the actress practises on her own most mornings. Other yoga fans include Kate Beckinsale, Nicole Kidman and Geri Halliwell.

JOGGERS

Matthew McConaughey has even employed a trainer to keep his jogging regimen in order - he aims to break a sweat every day. "I don't remember the last time I've been to a gym," he has said. "I'd just rather pick a point and say, 'Instead of driving over five minutes before, let's leave 45 minutes early and jog over'."

Meg Ryan likes to run for at least four kilometres at a time and also likes using a stair machine to keep fit.

Teri Hatcher combines the stair machine with jogging, Will Ferrell has run the Boston Marathon and Freddie Prinze jnr has run the Los Angeles Marathon.

PILATES FANS

Gwyneth Paltrow is a self-confessed pilates addict and has even had a pilates studio built in her New York home in the Hamptons. Another Brad Pitt ex, Jennifer Aniston, is also - in her words - "a Pilates person". "It's great. I had a hip problem, I had a chronic back [problem], and a pinched nerve and it's completely solved all of it. I love it. It makes me feel like I'm taller."

Sarah Jessica Parker practises pilates twice a week and other celebrity fans include Courteney Cox, Oprah Winfrey, Liz Hurley, Liv Tyler, Denise Richards and Claudia Schiffer.

GYM JUNKIES

Brooke Shields begins each day with a weight training session and Pamela Anderson is addicted to the treadmill. Anderson says, "It's the fastest way to get fit and keep your heart rate down."

Britney Spears' recent dramatic weight loss is rumoured to be the result of intense gym workouts while Jessica Simpson is often snapped leaving her local gym in West Hollywood and has said that she follows a strict routine of cardio and strength training.

Other gym junkies include Paris Hilton, Lucy Liu, Bridget Moynahan and Jennifer Garner.

BOXERS

Matt Damon boxes to stay fit and recently said, "I'm just boxing. I figure if you get hit enough times, it will fall off. If you put it on, it's easier to get it back off."

Kristen Bell is also a fan for its benefits to the body's core strength, and Sienna Miller has taken up the sport, sparked by her urge to shape up for her role in the upcoming film, G.I. Joe. House star Hugh Laurie is another fan and Jessica Alba has said she enjoys kickboxing.

SURFERS

The sport is popular in Hollywood for eliminating flabby arms and tummies - bronzed blondes Cameron Diaz and Gisele Bundchen are avid surfing fans. Other surfer stars include Adam Sandler, Owen Wilson and fitness nut Matthew McConaughey. Meanwhile, our own Koby Abberton has given Paris a couple of surfing lessons.

CYCLISTS

Demi Moore loves mountain biking and her weekly fitness routine involves waking up at 4am and cycling up to 30 kilometres. Yikes. Kate Hudson is another cycling enthusiast, often snapped on her bike by the paparazzi, and Reese Witherspoon and Jake Gyllenhaal are also fans.

SWIMMERS

Uma Thurman enjoys swimming out in the surf and Nicole Kidman likes to stay trim by swimming laps in an indoor pool. Rachel Griffiths and Nicole Richie (who loved being in the water while she was pregnant) are also celebrity fans.