It has long been believed that intense physical activity has positive effects on health. However, in modern times, it has been proven that moderate physical exercise reduces mortality rates. Simply walking for 30 to 45 minutes, 5 to 6 days a week, can increase average lifespan. Furthermore, the benefits of exercise are diverse.
In particular, physical activity is highly effective in preventing diseases and promoting overall health. Regular exercise keeps the heart, blood vessels, lungs, bones, muscles, and joints healthy. Engaging in various recreational sports activities such as jogging, aerobics, walking, golf, and swimming naturally improves physical, mental, and social well-being.
While there may be cases where individuals with certain illnesses should avoid exercise, in most cases, exercise has a positive impact on health promotion. Additionally, exercise stimulates the physiological activation of the brain and increases the arousal of the sympathetic nervous system. It also has a purifying effect, washing away aggressiveness and anger.
1. Physical Effects of Exercise
a) Prevention of cardiovascular diseases
Engaging in regular exercise strengthens the heart. For example, the heart muscle enlarges and the muscle fibers thicken, allowing it to supply more blood during exercise. Cardiac output, which refers to the amount of blood expelled with each contraction of the heart, increases with more exercise, effectively preventing heart diseases.
b) Decreased incidence of adult-onset diseases and improved cardiac (pulmonary) function
Adult-onset diseases include various circulatory disorders such as atherosclerosis, hypertension, rheumatic heart disease, and other conditions affecting organs, tissues, blood vessels, and the heart. In Korea, adult-onset diseases include symptoms related to diabetes, cardiac arrest, and stroke.
Most adult-onset diseases occur due to obesity and the accumulation of harmful substances in the body. By maintaining appropriate body weight and engaging in regular exercise to eliminate toxins, adult-onset diseases can be prevented. Regular exercise increases lung capacity, respiratory rate, and air passage through bronchial dilation, thereby enhancing pulmonary function.
c) Reduction of body fat and prevention of obesity
Continuing exercise along with a balanced diet helps reduce excessive weight and maintain a healthy weight. Exercise requires more energy than usual, resulting in the utilization of stored fat and subsequent weight loss. Exercise not only helps prevent obesity but also promotes muscle development. As muscles replace the weight of reduced fat, they become more toned, resulting in a more aesthetically pleasing body. Regular exercise helps control weight and prevents obesity.
d) Strengthening of muscles and prevention of osteoporosis
Regular exercise increases lung capacity and muscle strength, improving overall bodily functions. Muscle strength refers to the ability to sustain force, and exercise increases the supply of minerals and calcium to strengthen bones. Vigorous weight-bearing exercises reduce the risk of osteoporosis, particularly after old age. Post-menopausal women are prone to osteoporosis, making exercise essential for prevention.
e) Increase in basal metabolic rate
Basal metabolic rate refers to the minimum energy required for biological functions to sustain life. Exercise increases muscle mass and subsequently raises the basal metabolic rate, facilitating easier weight control by utilizing excess energy from food intake.
f) Maintenance of good posture
Exercise strengthens the abdominal muscles, reduces fat, and helps maintain good posture. It also strengthens the abdominal muscles, facilitating proper posture and reducing back pain.
2. Mental and Emotional Effects
a) Stress reduction
Physical and mental stress can have a significant negative impact on each other. Mental stress affects the body, leading to physical fatigue. Engaging in exercise helps relieve fatigue and reduce stress. Stress is the root of many diseases and can cause muscle tension, pain, anger, insomnia, abdominal pain, urinary disorders, and more. Stress also creates a vicious cycle between the body and mind. However, exercise triggers the release of endorphins in the brain, relaxing the muscles and helping to alleviate stress.
b) Alleviation of depression
Regular exercise can regulate anxiety, depression, and anger in the short term, leading to feelings of happiness. It also boosts self-confidence and triggers the release of endorphins in the brain, creating a sense of pleasure. Psychologist Roger Walsh described exercise as the most cost-effective and side-effect-free treatment for mental health.
c) Enhancement of self-esteem
Regular exercise improves physical fitness and exercise abilities, enabling individuals to lead emotionally and mentally healthy lives while maintaining a good physique. It also has a positive effect on appearance, leading to increased self-confidence. The positive effects on appearance act as an achievement experience, enhancing self-esteem.
Exercise has positive effects on one's talents, personality, health, and appearance. Non-aerobic exercise has more beneficial effects than aerobic exercise.
d) Promotion of sound sleep and prevention of insomnia
Regular exercise improves the quality of sleep and helps with stress relief. Engaging in exercise about one hour before bedtime can prevent insomnia. Sound sleep enhances the quality of life.
3. Social Effects
a) Social Effects
Engaging in exercise allows individuals to connect and communicate with new people. Through this, relationships are formed, and individuals can comfortably exercise with familiar people. Exercising together naturally fosters a sense of closeness and helps maintain interpersonal relationships.
b) Social development
Exercising together allows individuals to develop social skills through competition and teamwork. It helps cultivate empathy towards others and the ability to engage in healthy competition within social groups or organizations.
c) Strengthening community consciousness
Exercising together fosters a sense of belonging, enabling regular participation in exercise and promoting a sense of community. It allows individuals to experience a sense of community consciousness through exercise.
