How can sonic run so fast without getting tired?

Sonic the Hedgehog can run at incredible speeds due to his unique physiology and abilities, which are part of the fictional universe he inhabits. He possesses superhuman agility and reflexes, along with a metabolism that allows him to recover quickly and maintain his energy levels. Additionally, his character is often depicted as having access to the "Speed Force" or similar energy sources, enabling him to sustain high speeds without tiring easily. Ultimately, his speed and endurance are creative elements designed for entertainment in Video Games and media.