United Kingdom, Aug. 6 -- John Cena is retiring from WWE because he is "not as strong and fast" as he once was.

The 48-year-old wrestler will bring his legendary career to a close later this year and explained that he wants to step away from the sport before his athleticism declines too significantly.

John told People magazine: "Age plays a factor. I'm not as strong or as fast as I used to be. I made a promise when I started gaining some notoriety that when I'm a step slower, I will go, because there will be kids just as hungry as I was who have earned a shot to see if they can make it."

The 17-time WWE world champion explained that he is now focusing on spending time with his wife Shay Shariatzadeh.

Cena said: "My health and my dedic...