The 31-year-old Argentina international's future has been the subject of intense speculation ever since it emerged that he had asked to be allowed to return to South America for personal reasons.
However, manager Alan Pardew revealed on Friday that his captain would be staying, and now the defender has spoken for the first time about the matter. Coloccini told the Magpies' official web site, www.nufc.co.uk: "The last few weeks, there has been a lot of talk about my future. But I am staying here, and of course I will give 100 per cent like I always do."
He added: "I have been here five years and Newcastle has given me a lot and done a lot for me. I have to be true to the club. I will give 100 per cent. I love football and once I am on the pitch, it is different. The problems I have are outside the pitch.
"I think if you look at a game like Norwich or the last few games, I have played normally. The results were not the best, but I have given everything to try to win. I heard in the city and around the club that the fans think I have my head elsewhere thinking about other things, or that I am not the same player as last season.
"But like I say, for me football is my life, I love it. When I am on the pitch, I give everything to win. I give 100 per cent. I did that at Newcastle, Deportivo La Coruna or any club I've played at. The fans have to know and be sure that when I am the field, I give 100 per cent. I am the captain of the team and I take the responsibility.
"I think everybody has problems outside of their work in life. It is difficult, but now I am here and all I have in my head is to make sure we are in the Premier League next year. That is my only objective."