What exercise accelerates aging?

Excessive high-intensity exercise without adequate recovery can accelerate aging by increasing oxidative stress and inflammation. Overtraining raises cortisol levels chronically, which breaks down collagen and muscle. Extreme endurance activities like ultra-marathons without proper nutrition and rest can accelerate cellular aging. Exercising in direct sunlight without sun protection causes significant skin damage and premature aging. Heavy strength training with poor form can cause joint damage and injury. However, moderate, regular exercise slows aging, so the key is balance. Listen to your body, include rest days, vary your routine, eat adequately to fuel workouts, stay hydrated, protect your skin outdoors, and avoid overtraining. Most people under-exercise rather than over-exercise, so focus on consistency.