"And I still have a hard time beating him in arm wrestling despite the 40 years of age gap."
Another example, from the article, that backs up what you are saying. Arm wrestling, is not a clear overall indicator of total strength or fitness. It's as much about technique, rules, psychology (through sh*t talking or facial expressions), and very specific muscle development than anything else. Doesn't show how much a person could lift or squat. Strength in one area, doesn't mean strength in another or if people in the past were "stronger".
Another example, from the article, that backs up what you are saying. Arm wrestling, is not a clear overall indicator of total strength or fitness. It's as much about technique, rules, psychology (through sh*t talking or facial expressions), and very specific muscle development than anything else. Doesn't show how much a person could lift or squat. Strength in one area, doesn't mean strength in another or if people in the past were "stronger".