Denver Broncos quarterback Peyton Manning has insisted that he is still enjoying the sport ahead of the new season.

The 39-year-old was heavily linked with retirement after the 2014 campaign, but he has stayed for at least one more year and has brushed off talk that he is no longer motivated.

He told the Broncos' website: "I'm going to tell you one thing I am not - I am not bored in the least bit. I am stimulated by studying. I feel like I'm engaged in trying to learn something new from Gary Kubiak [and] Rick Dennison and learn a little something new from Owen Daniels.

"Any time somebody has a question of me, I'm glad to answer that, about a route from Owen or James Casey. That's been the truth.

"Changes, instead of being stymied by any type of change, be stimulated by them. That's been true for me, and that's been a real positive, to tell you the truth."

Manning won the Super Bowl in 2006 with the Indianapolis Colts.