Spoiler alert, swimming, popular form of exercise, easy on the joints, turns out to not

be good for weight loss.

You're working hard, burning calories, so why don't the inches and pounds come off?

Watch the video to find out. Swimming and aquatic exercise in general are popular alternatives to land-based activities,

such walking or biking.

The buoyancy helps take some of the weight-bearing stress off the joints, but swimming appears

to be

less effective for weight loss.

Obeses women were randomized into an hour a day of walking, cycling, or swimming.

Six months later, the walkers lost an average of 17 pounds.

The cyclists lost an average of 19 pounds, and the swimmers didn't lose an ounce.

In fact, they actually gained 5 pounds. Gaging skinfuls to estimate body fat, the measurement

slimmed more than 40 percent in the walking and cycling groups, but there was no change

at all in the swimming group. What's going on?

And check this out.

The more the women walked, the more they lost weight.

The more the women biked, the more they lost weight.

But the more laps they did didn't seem to matter.

Even an hour a day, no weight loss.

What is going on?

Well, it turns out that some exercise boosts appetite more than others.

See, while land-based exercise does not stimulate a compensatory increase in appetite and calorie intake,

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