As the son of Odin and Gaea, Thor's strength, endurance and resistance to injury are greater than the vast majority of his superhuman race. He is extremely long-lived (though not completely immune to aging), immune to conventional disease, and highly resistant to injury. His flesh and bones are several times denser than a human's.
As Lord of Asgard, Thor possesses the Odinforce, which enables him to tap into the near-infinite resources of cosmic and mystical, enhancing all of his abilities. With the vast magical power of the Odinforce, Thor was able to even dent Captain America’s shield with Mjolnir.