Last offseason, Broncos strength and conditioning Luke Richesson said he thought Peyton Manning was capable of playing another three to five seasons in the NFL.

Maybe that's because Manning, even at 39 years old, continues to get stronger.

@VicLombardi @markkiszla fantastic presentation by Broncos s & C coach Richesson.Said Peyton has blown away all his personal lifting records — Jaron Cohen (@JaronCohen1) May 21, 2015



That Tweet is from Ponderosa High School head coach Jaron Cohen, who was in attendance at a high school coaches clinic put on by the Broncos staff earlier this week. Richesson was in attendance and addressed the coaches, sharing that anecdote about Manning with them. It's pretty impressive that, despite the fact Manning is entering his 18th season and has undergone four neck surgeries, he's apparently stronger than ever.

Manning contemplated retirement briefly after last season, but he now returns for his fourth year in Denver. He's under contract through the 2016 season, and if he can keep his body in such good condition, he could very well make Richesson's declaration last offseason a true statement.