Building muscle takes time and patience, but with a solid workout routine, proper nutrition, and adequate rest, you can achieve your fitness goals. Research shows that resistance training, especially weightlifting, is the most effective way to build muscle mass over time. Factors such as protein intake, calorie consumption, sleep schedule, lifting routine, training age, and genetics all play a role in muscle growth.

Source: https://www.cnet.com/health/fitness/how-long-does-it-really-take-to-build-muscle/#ftag=CAD590a51e