Stock Photo - Teenage Boy Flexing His Muscles

Following these steps will help you give your muscles the exercise and the fuel they need to get bigger. This hormone encourages your muscles to grow, says William Roberts, MD, a professor of family medicine and a youth fitness expert at the University of Minnesota. JavaScript is required to view this site. KJ Apa tattoos sexy boys handsome redhead menswear teen heartthrob fashion inked boys biceps arms muscles jeans tshirt ginger boy photoshoot cute boy gorgeous hot boys hottie hunky actors. But… Set your sights higher than fast food and candy. Another muscle-building hormone your body makes is insulin, Anding says. So within 30 minutes after a workout, eat a blend of carbs and protein.