"What we found was that those who continued exercising, despite modest weight regains, regained zero percent visceral fat a year after they lost the weight," Hunter said. "But those who stopped exercising, and those who weren't put on any exercise regimen at all, averaged about a 33 percent increase in visceral fat."

"Because other studies have reported that much longer training durations of 60 minutes a day are necessary to prevent weight regain, it's not too surprising that weight regain was not totally prevented in this study," writes Hunter. "It's encouraging, however, that this relatively small [amount] of exercise was sufficient to prevent visceral fat gain."

The study also found that exercise was equally effective for both races.

ed.uab/humanstudies/