Golf icon Gary Player became known as "Mr. Fitness" back in the 50s, and he is still living up to that nickname today as an 81-year-old.
Check out this video Player posted on Twitter in which he just absolutely crushes it on the treadmill:
It's important to train your mind and your body to move fast as you age. Don't give yourself limits. Keep working. Keep moving. pic.twitter.com/GDHLRWqsAC
— Gary Player (@garyplayer) February 8, 2017
Player appeared in the 2013 edition of ESPN The Magazine's annual body issue along with athletes who were were mostly in their 20s.