Building muscle mass involves a combination of proper nutrition, strength training, and recovery. To start, ensure you're consuming enough protein, as it's crucial for muscle growth. A balanced diet with lean proteins, complex carbohydrates, and healthy fats is essential. Engage in regular strength training workouts, targeting all major muscle groups. Compound exercises like squats, deadlifts, and bench presses are effective for muscle growth. Focus on progressively increasing the weight and intensity of your workouts over time.

Adequate rest and recovery are key. Muscles grow during rest, so get 7-9 hours of sleep and allow 48 hours between training the same muscle group. Stay hydrated to support muscle function. Consider supplements like protein powder and creatine, but consult a professional before use. Lastly, stay consistent and patient, as building muscle takes time and dedication.