Stress adversely affects physical health and exercise ability by triggering various physiological responses. Elevated stress levels can lead to increased cortisol, which can result in muscle breakdown, fatigue, and hindered recovery. It may also result in decreased motivation to exercise, causing individuals to skip workouts or engage less effectively. Additionally, stress can impact sleep quality, further exacerbating fatigue and reducing athletic performance. Managing stress through activities like mindfulness or relaxation can promote better physical health and enhance overall exercise ability, leading to more optimal performance outcomes.