How did Hercules become strong?

Hercules became strong primarily due to his divine heritage as the son of Zeus, the king of the gods, and Alcmene, a mortal woman. His strength was further developed through rigorous challenges and labors assigned to him, including the famous Twelve Labors, which tested his physical and mental limits. Additionally, his experiences in battle and encounters with various mythical creatures contributed to honing his abilities and resilience.