This despite the taunts from teammate Virgil van Dijk over his age.
"To be honest I feel fine, I feel the same," he said on TalkSport Sports Breakfast.
"I'm waiting for that day when we do a session and I feel it a bit harder than the boys.
"It's always nice when I'm asking the young lads if I'm finding a hard session tough and they're agreeing with me. I don't know, they might be doing that just to make me feel better!
"Virgil [Van Dijk] gives me plenty of stick – that's what one of the celebrations last season was about [his 'old man' celebration after scoring against Cardiff back in April].
"He's always joking. When there's Premiership Years or a game in black and white on the TV in the treatment room, he'll say, 'Milly, what number are you?"