Heavyweights

Heavyweights stylized onscreen as Heavy Weights is a 1995 comedy film directed by Steven Brill and cowritten by Brill with Judd Apatow. Heavyweights is about a fat camp for kids that is taken over by a fitness guru named Tony Perkis Ben Stiller.

But all is not well at Camp Hope. The first night of the summer brings the revelation that the original owners of Camp Hope Jerry Stiller and Anne Meara have entered bankruptcy and the camp has been bought by fitness entrepreneur Tony Perkis Ben Stiller, who announces his plan to make the camps new exercise regime into the top weight loss infomercial in the country. Tony tries to make himself seem like someone the campers can relate to, saying that he was a fat kid when he was younger too, but his methods of motivating the campers border on psychotic.Tony cleanses the cabins of the campers food caches, cuts off their contact with the outside world, and installs an exercise outline of trendy fitness techniques that downplay fun to the point of humiliation. ........

Source: Wikipedia