Without a prescription, it is against the law and risky to consume them. They are used by some athletes to promote muscular growth.
More experienced lifters will detect changes in three to four weeks, but most beginners will start to observe muscle gain around eight weeks. With the proper strength exercise and diet, the majority of people grow one with two pounds of lean muscle each month.
Three main pathways of muscle growth, namely muscle tension, metabolic stress, and muscle injury, are described by exercise physiologist Brad Schoenfeld. The amount of weight you lift frequently has an impact on all of these variables.
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