Cytosport Muscle Milk TV Spot, 'Own Your Strength: Heart' Featuring Tua Tagovailo

Tua Tagovailoa knows a thing or two about building muscle, but he claims there's a very important one that Muscle Milk can't help build. The quarterback says this mysterious muscle is one you can't see in the mirror, yet it pulls you out of bed to get to the gym at five in the morning. This muscle pushes you day in and day out until you reach your breaking point. Tua recognizes that Muscle Milk helps to build muscle, but having heart is what truly builds strength.