Exercise and nutrition work together for optimal performance by providing a balanced approach to health and fitness. Adequate nutrition fuels the body, supplying the necessary macronutrients and micronutrients to support workouts. Carbohydrates enhance energy levels, while protein aids in muscle recovery and repair. Regular exercise encourages effective nutrient utilization and improves metabolism. Together, they create a positive feedback loop, where exercise enhances appetite for healthy foods, and proper nutrition boosts exercise performance, leading to overall improvement in fitness and health.