According to CNN Membership Manager at a health club is the 6th most stressful job in America:

Median pay: $42,600
% who say their job is stressful: 67%

You know the guy who calls you during dinner to ask why you let your membership lapse? Well it turns out he’s not thrilled about bugging you at home either. Reaching out to existing and former members of museums, fitness centers and health clubs in order to meet sales goals is not an easy way to make a living. The callers have to deal with insults, hang ups, and other bad reactions to the unwelcome calls. Plus, they often work long or odd hours so they can catch people at home.

“It’s a numbers game and you have to get calls out, and it definitely entails rejection,” said Cathy Gambino, a regional sales manager of Equinox in southern California. “Sometimes you just can’t break people down.”

Here’s the full article in CNN:

http://money.cnn.com/galleries/2009/pf/0910/gallery.stressful_jobs/6.html