The ability of mind to control the body is not only true for great athletes. Ellen Langer is a psychologist who is interested in the mind body relationship. She studied hotel housekeepers who spent all day at work bending, stretching, and lifting. Langer asked them, “Are you physically active?” They said no, they did not get much exercise. Medical tests agreed. The housekeepers had the same physical health as office workers. This result did not make sense to Langer. The women were getting a lot of good exercise. Why weren’t they showing any benefits?