After school, Andrew rushed up to his room and instantly drank the whole bottle of sports formula. He didn't know what would happen, but if it'd help him play sports he knew he wanted it all.
He sighed as he finished the bottle, and instantly felt more energetic. His dad had a home gym in the basement Andrew wasn't really meant to use, but his parents weren't home so he figured what the hell. He started off with a bench press, the first weight that felt like a challenge was 140lb. He strained to lift it, but he loved the feeling of a good workout. At least, he did now.
When he'd finished with that weight, his chest was heaving from the effort, his body glistening with sweat, and he felt tired all over. So he went back up to his room to take a nap. As he collapsed onto his bed, he fell into a deep sleep.
Andrew woke up several hours later, feeling refreshed and pumped again. His parents were both out of town so he decided to go use the gym again, but as he walked out of his room he saw himself in the mirror.
"Hang on a minute," he said aloud as he noticed something. He could see his chest through his T-shirt. He'd never been able to before. But he could definitely see his chest through it. He peeled off the t-shirt from his still sweaty body, and saw two firm, round pecs sticking out from his formerly flat chest. His arms were also bigger - he pulled a double bi and he got pretty good peaks.
"Fuck yeah," he said, admiring himself. It didn't register with him that he'd cursed, his mind had changed without him realising.
He did 4 more sets of various exercises in the gym before finally sleeping for the night, and when he woke up the next morning he found he was pretty buff now.
"If this is what one drink does, how big am I going to be after six?!" Andrew asked himself.
He went off to school, and found Mike waiting outside for him.
"Dude pretty impressive! How you feeling?"
"Fuckin' pumped man," Andrew replied, "Can't wait for that next drink!"