He said: "I've got a year left and as long as I feel healthy, I'm enjoying football and playing a lot of games, I will carry on.
"I'm enjoying it more than ever. When you realise the end is coming, you try to enjoy every game because you appreciate how hard it is to make a career in this sport.
"It does take longer to recover now than when I was 19 or 20 and could play every day. But if you look after yourself, you can stay as fit as ever.
"I'm not as fast as I was, but you make up for that with experience and use your head more. With the nutritionists, diets and science these days, barring injury, there is no excuse for not playing into your 30s."