Improper breathing during exercise can adversely affect performance. When individuals hold their breath or breathe inadequately, it can lead to decreased oxygen availability, resulting in early fatigue and reduced endurance. Efficient breathing is essential for maintaining proper oxygenation of the muscles and clearing out metabolic waste products like carbon dioxide. Furthermore, improper breathing can lead to muscle tension and decreased concentration, impacting overall workout effectiveness. Therefore, mastering proper breathing techniques is vital for optimizing performance in any physical activity.