Full strength goes to 11.
Super strength isn't out of reach for everybody. Myostatin-related muscle hypertrophy is a rare condition that effects the MSTN gene and is characterized by reduced body fat and increased muscle size. Affected individuals have up to twice the usual amount of muscle mass in their bodies and tend to have increased muscle strength.
The MSTN gene provides instructions for making a protein called myostatin, which is active in muscles used for movement. This mutation reduces the production of functional myostatin and leads to an overgrowth of muscle tissue. Because there are so few known cases of this condition, little is understood about potential negative side-effects. Just know that there are more than a few people out there that are about 40% stronger than us regular mortals.