Why should holding one's breath during exercise be avoided?

Holding one's breath during exercise should be avoided primarily because it can lead to dizziness and fainting. This phenomenon is known as the Valsalva maneuver, which occurs when a person exhales forcefully with a closed airway. This practice can increase intrathoracic pressure, reduce venous return to the heart, and consequently decrease cardiac output, eventually leading to a sudden drop in blood pressure and causing lightheadedness or even fainting.

Proper breathing techniques during exercise are essential for maintaining adequate oxygen supply to the muscles and ensuring efficient cardiovascular function. Controlled breathing helps improve endurance, supports overall physical performance, and reduces the risk of adverse effects that can arise from improper breath-holding.

While the other options may seem beneficial at a glance, they do not accurately reflect the real dangers associated with breath-holding during physical activity. Understanding the significance of maintaining a steady breathing pattern is crucial for safe and effective exercise, especially in older adults whose cardiovascular responses may vary.