While it is easy to understand the importance of exercise for the upkeep of the body, we do not always realize that exercise is also important for our brain. A brain stimulated with sensory messages both energizes and relaxes us. Since the ear is the main channel for the transmission of sensory messages from the human body, it plays a key role in all human functions.
This stimulation may be impaired when the brain triggers a mechanism of inhibition or protection, which may occur following an isolated traumatic event known as emotional shock.
The brain also tends to protect itself progressively when the external environment is perceived as aggressive. This may be true for people who are facing a reorganization of their routine, an increase of responsibility, the loss of familiar references, and social pressure.