What's better: An all-cardio exercise program? Or all weights? According to fitness experts, any kind of physical activity is good for you. Giving your all to yoga, surfing, or running without mixing it up is A-OK.

"All exercise counts," says Dr. Jeffrey Tanji, associate medical director of sports medicine at the University of California, Davis. Shopping even counts, says Tanji who reports that when his wife shops, she moves so swiftly from store to store there's no doubt she's getting an aerobic workout.

Get at least 30 minutes of moderate-intensity activity most days of the week and you won't be cited by the fitness police. But there's definitely something to be said for variety, and for picking the right method for meeting your desired goals. Want to look lean and mean, for example? Then all weight training won't do it. You'll gain muscle mass this way, but you won't lose much fat if you're overweight. Watch your diet and add some intense cardio for more streamlined effects.

So what's better? Both cardio and weights are great, depending on what you wish to achieve. But toss them together and your more well-rounded workout routine will really make a difference.