I am a busy person with a bad back so I have only mon, wed, fri to workout. I want to gain serious muscle size but not sure how to set up an awsome muscle build program. I really cant do sqwats anymore because of my lower back issue. And I only have time to workout in the gym for an hour . So is there anyone with a bad back that only workout 3 days a week for an hour and gain serious muscle while using gear?????
please help
please help

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