"Just Do It"

That's the advice nutritionist Lisa Roth gave.

"It's better to move than not move," Roth told me.

Take the stairs. Amp up your walking. Everything counts, she said.

How Should You Just Do It?

A balance between cardiovascular and strength training keeps the heart healthiest, said Justin Farinelli, a certified personal trainer at Gainesville Health and Fitness Center in Gainesville, Fla. A good, structured circuit training program can keep your heart rate elevated as much as any cardio workout.

The optimal workout schedule includes strength training three days a week for 45 to 60 minutes, and cardio two days a week for 30 to 45 minutes, Farinelli recommended. Working out more than about 75 minutes doesn't help you; it hurts you.

The trainer's most successful clients make their health a priority, Farinelli disclosed. It may seem like a big time committment, but you get that hour at the gym back tenfold by your increased energy. If your body doesn't need to be a high-performance machine, it won't be. So make it a priority to workout.

The most important thing to remember with exercise is to "keep variety" and to "keep it fun," Farinelli urged.

"It's most important that you're just active."

However, one exercise that creates muscle mass the best is squats, Farinelli revealed.

"Doing crunches is not as effective as doing squats," he continued. You're better off spreading uour time to build muscle mass in multiple muscle areas than concentrating on your abs.