Many people says that masturbation consumes the testosterone hormone, so it lowers the rate of your muscles' gain. (in weightlifting) is that true?

Cleveland Clinic: Masturbation is a normal, healthy part of your sexual development. It involves the use of your hands, fingers, sex toys or other objects to stimulate your genitals and other sensitive areas of your body for sexual pleasure. Masturbation has many documented health benefits. It may reduce stress, improve sleep and ease pain, among other benefits.