Susan Chollar

In the following viewpoint, Susan Chollar cites various studies and anecdotal examples to support her view that exercise can lift depression, ease anxiety, and boost self-esteem. She argues that exercise produces various physiological reactions in the human body that in turn improve the exerciser's mental state. For example, a vigorous workout raises the body temperature, according to Chollar, producing a tranquilizing effect similar to that caused by a hot bath. Exercise can also correct the brain chemical imbalances that cause depression, she asserts. Chollar is an Aptos, California, writer who specializes in science and health issues.

As you read, consider the following questions:

1. What is Joan Gondola's "Aha!" state, according to Chollar?
2. What neurotransmitters does the author say are increased by exercise? How do these changes affect the mood of the exerciser?
3. According to Chollar, what were...