There's a real mutation nicknamed the "Hercules gene" — babies born with muscle already carved into their tiny arms and legs, strong enough to hang in a gymnast's iron cross before they can even walk - Space Daily

A rare genetic mutation nicknamed the “Hercules gene” is drawing attention because it appears to remove the body’s normal restraint on muscle growth. The condition can produce unusually muscular children and exceptional strength from the earliest months of life.

In the reported Michigan case, a five-month-old infant demonstrated an extraordinary movement while being held by the hands. Rather than simply dangling, the baby pulled sideways into an iron-cross position, a demanding hold associated with competitive gymnastics and typically requiring years of training.

The example has fueled interest in how changes to the body’s muscle-growth controls can affect strength and development. It also raises broader questions about whether such biological mechanisms could one day be deliberately adjusted, and what risks or ethical concerns that might involve.