It is incorrect to say that you should not use any specific type of weights if your goal is to build muscle mass. Both free weights (such as dumbbells and barbells) and weight machines can be effective for building muscle mass, as long as they are incorporated into a well-rounded workout routine. Additionally, both high intensity (heavy weights) and low intensity (lighter weights) can be used to stimulate muscle growth and promote muscle hypertrophy. The most important factor for building muscle mass is progressive overload, which involves gradually increasing the resistance or intensity of your workouts over time.
