Lifewatch: An hour of exercise a day

TAMPA -- Research shows that it may take more than 30 minutes of exercise to stay in shape.

Whether on an elliptical, treadmill, or bike, finding time to exercise can be worthwhile.

Six months ago, Geneveve Llaven's cholesterol and sugar levels were high, so she started exercising two hours a day.

And according to a new study in the Archives of Internal Medicine, she's on the right track.

Researchers say women need to exercise at least 55 minutes a day to maintain their figures.

Although 55 minutes may sound like a lot of time, fitness buff Ann Gilbert says you can break up the time to make it more manageable.

"They can start with ten here, add ten there, add ten when they walk the dog, so the accumulation of 55 minutes per day is going to get them comfortable with the challenge," said Gilbert.

The study only included 200 overweight and obese women.  They were all placed on diets of 1,500 calories a day or less.

The women who worked out more kept it off, while those who didn't gained it back.

Reported by Kristy Ondo