How does exercise reduce stress?

How does exercise reduce stress, and can exercise really be relaxing?

Rest and relaxation. It's such a common expression that it has become a cliche. And although rest really can be relaxing, the pat phrase causes many men to overlook the fact that exercise can also be relaxing. It's true for most forms of physical activity as well as for specific relaxation exercises.

Exercise is a form of physical stress. Can physical stress relieve mental stress? Alexander Pope thought so: "Strength of mind is exercise, not rest." Plato agreed: "Exercise would cure a guilty conscience." You'll think so, too — if you learn to apply the physical stress of exercise in a controlled, graded fashion.

How exercise reduces stress

Aerobic exercise is key for your head, just as it is for your heart. You may not agree at first; indeed, the first steps are the hardest, and in the beginning, exercise will be more work than fun. But as you get into shape, you'll begin to tolerate exercise, then enjoy it, and finally depend on it.

Regular aerobic exercise will bring remarkable changes to your body, your metabolism, your heart, and your spirits. It has a unique capacity to exhilarate and relax, to provide stimulation and calm, to counter depression and dissipate stress.

It's a common experience among endurance athletes and has been verified in clinical trials that have successfully used exercise to treat anxiety disorders and clinical depression. If athletes and patients can derive psychological benefits from exercise, so can you.

How can exercise contend with problems as difficult as anxiety and depression? There are several explanations, some chemical, others behavioral.

The mental benefits of aerobic exercise have a neurochemical basis. Exercise reduces levels of the body's stress hormones, such as adrenaline and cortisol. It also stimulates the production of endorphins, chemicals in the brain that are the body's natural painkillers and mood elevators. Endorphins are responsible for the "runner's high" and for the feelings of relaxation and optimism that accompany many hard workouts — or, at least, the hot shower after your exercise is over.

Behavioral factors also contribute to the emotional benefits of exercise. As your waistline shrinks and your strength and stamina increase, your self-image will improve. You'll earn a sense of mastery and control, of pride and self-confidence. Your renewed vigor and energy will help you succeed in many tasks, and the discipline of regular exercise will help you achieve other important lifestyle goals.

Exercise and sports also provide opportunities to get away from it all and to either enjoy some solitude or to make friends and build networks. When your body is busy, your mind will be distracted from the worries of daily life and will be free to think creatively.

Almost any type of exercise will help. Many people find that using large muscle groups in a rhythmic, repetitive fashion works best; call it "muscular meditation," and you'll begin to understand how it works.

Walking and jogging are prime examples. Even a simple 20-minute stroll can clear the mind and reduce stress. But some people prefer vigorous workouts that burn stress along with calories. That's one reason ellipticals are so popular. And the same stretching exercises that help relax your muscles after a hard workout will help relax your mind as well.

Autoregulation exercise and stress relief

Regular physical activity keeps you healthy as it reduces stress. But another special sort of exercise known as autoregulation exercises can also reduce stress.

Stress comes in many forms and produces many symptoms. Mental symptoms range from worry and irritability to restlessness and insomnia, anger and hostility, or sensations of dread, foreboding, and even panic.

Mental stress can also produce physical symptoms. Muscles are tense, resulting in fidgetiness, taut facial expressions, headaches, or neck and back pain. The mouth is dry, producing unquenchable thirst or perhaps the sensation of a lump in the throat that makes swallowing difficult.

Clenched jaw muscles can produce jaw pain and headaches. The skin can be pale, sweaty, and clammy. Intestinal symptoms range from "butterflies" to heartburn, cramps, or diarrhea. Frequent urination may be a bother.

A pounding pulse is common, as is chest tightness. Rapid breathing is also typical, and may be accompanied by sighing or repetitive coughing. In extreme cases, hyperventilation can lead to tingling of the face and fingers, muscle cramps, lightheadedness, and even fainting.

The physical symptoms of stress are themselves distressing. In fact, the body's response to stress can feel so bad that it produces additional mental stress. During the stress response, then, mind and body can amplify each other's distress signals, creating a vicious cycle of tension and anxiety.

Because the root cause of stress is emotional, it is best controlled by gaining insight, reducing life problems that trigger stress, and modifying behavior. But stress control can — and should — also involve the body.

Aerobic exercise is one approach; physical fitness will help promote mental fitness. But there is another approach: you can learn to use your mind to relax your body. The relaxed body will, in turn, send signals of calm and control that help reduce mental tension.

Autoregulation exercises are a group of techniques designed to replace the spiral of stress with a cycle of repose. Several approaches are available.

Harvard Health Publishing

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