Nutrition is crucial for supporting a fitness regimen as it provides the essential nutrients needed for energy, recovery, and muscle repair. Consuming adequate carbohydrates fuels workouts, while proteins support muscle synthesis and recovery post-exercise. Healthy fats are necessary for hormone production, which can influence overall fitness performance. Additionally, proper hydration aids in maintaining performance levels and preventing fatigue. Incorporating a balanced diet rich in vitamins and minerals also supports optimal bodily function, ensuring the body can handle physical stressors experienced during training.