Even the senior England players these days are young at heart.
Which explains how teenagers such as Jadon Sancho, Declan Rice and Callum Hudson-Odoi have managed to feel at home at St George’s Park so quickly this week.
“When I joined it was a little different, eight years ago,” Walker recalled.
“There were a lot more senior players – Steven Gerrard, Frank Lampard, John Terry, Rio Ferdinand, Ashley Cole.
“There was a lot of characters in the dressing room and as a 20-year-old coming into that it was a little bit daunting.
“They tried to welcome me the best but now there’s a lot more of my age group.
“We are all into the similar sort of thing – whether its Playstation or playing FIFA, we all mingle with each other so they can come straight in and feel comfortable.”
Fast approaching 29, technically Walker is perhaps not as young as he claims.
But he believes playing with his three children, Roman, Riaan and Reign has knocked years off him.
“It’s kept me feeling younger, I’ll tell you that!” he said.
“I’m 28 now, I’ve played a lot of games but I still feel fresh.
“It’s about being professional. I’ve got three boys at home so they keep me on my toes.
“It’s about finding that balance. You have to perform at such a high level, but you have to be a dad as well.
“It’s a fine balance but I feel I’m juggling it well.
“Coming off the fantastic summer we had, I didn’t have much rest because I played in the Community Shield for Manchester City – but I still feel fresh and raring to go.”