Not Very Healthy

Inbreeding was widespread by the time King Tut was born, as seen by the status of his own marriage, and he was one of many kings who suffered as a result. He never outgrew his adolescence, but one factor that contributed to his need for a cane was the fact that he had a clubfoot. There were numerous canes in his grave as if to act as a harsh reminder of this fact in the afterlife. It would have been challenging for him to stand in a chariot, thus it must have been even more challenging for him to become a proficient archer.

The worst of it, though, wasn't that. He also developed a significantly compromised immune system as a result. This meant that he battled bouts of malaria for years, not only till the end of his life. He fought with malaria tropica, a particularly dangerous variety of the illness, according to National Geographic.

In fact, his body is the oldest one ever found with even a tiny amount of malaria, much less enough to show a lifetime's worth of various strains. He had a partially healed fracture in his left thighbone, which was discovered in 2005. An infection from this fracture became the child king's most likely cause of death. Since he only lived to be 19 years old, it almost looks like a coincidence.