Final answer:
Exercise can be harmful if it's too intense, continuous without proper rest, or if done improperly, leading to heart problems, injuries, muscle damage, and overuse injuries. Nevertheless, moderate exercise reduces cardiovascular risk factors and contributes to overall health, but the balance and rest are key.
Step-by-step explanation:
It is possible for exercise to pose a risk to someone's health if it is done excessively or incorrectly. Extreme and continuous intense physical activity without proper rest can lead to scarring of the heart and heart rhythm abnormalities, particularly in athletes who train for multiple marathons. Moreover, overexertion can cause injuries to muscles and joints, and excessive exercise in females may result in amenorrhea, indicating an undue stress on the body. In addition, maladjustment to extreme exercise patterns may impair health. Conversely, moderate exercise has a multitude of benefits, including reducing stress and improving cardiovascular health and body image.Physical inactivity is a risk factor for coronary artery disease and cardiovascular mortality, whereas physical exercise can reduce several risk factors for cardiovascular disease. Regular physical exercise is essential in maintaining a healthy muscular system, with exercised muscles being bigger and stronger. However, resistance training must be properly executed to prevent overuse injuries to muscles, tendons, or bones. Rest is crucial as muscles require time to recover and repair after intense exercise.