One tried and true method to get products to appear “manlier” is to feature an athlete as your spokesman. Enter Charles Barkley for Weight Watchers for Men. Late last year, the dieting service launched a $10 million ad campaign featuring the former “Round Mound of Rebound” set against a stark black background urging guys to “lose like a man.” A number of Weight Watchers’ competitors have gone the same route. Nutrisystem, for example, tapped former NFL quarterback Dan Marino and coach Don Shula. “Although we are predominantly female, we do have a decent percentage of men following the program,” Chief Marking Officer Cheryl Callan told AdAge. And the company needs those men. Weight Watchers revenue has been falling steadily of late. First-quarter earnings dropped 11% this year and its stock has fallen by almost half over the past 12 months.