Totally disagree with 3). Running is all physical, assuming you’re a trained athlete and are disciplined in the first place. People glamorize the mental strength. Your body and legs are your boss. Read this good note https://www.linkedin.com/feed/update/urn:li:activity:7160019782891696129?updateEntityUrn=urn%3Ali%3Afs_feedUpdate%3A%28V2%2Curn%3Ali%3Aactivity%3A7160019782891696129%29