His lack of energy is not surprising given his strictly controlled diet and a training schedule which has put him through 80 rounds of sparring - more than for any previous fight.
The 35-year-old has been sparring with three fighters a night on a rotation basis. His opponents, including David Aloua and Daniel McKinnon, have the luxury of a break after a couple of rounds while Cameron boxes on in sessions designed to push him to the limit.
He said of the sparring sessions: "It put a lot of pressure on me but that's what I needed.''
Asked if he had lost power as well as weight, Cameron said comments relayed to his manager Ken Reinsfield suggested he hadn't. "My sparring partners have all said to Kenny, `hey man that guy is losing weight but he's not losing any power, he's actually getting faster and harder'.
"The weight is not a factor to me. I know I'm stronger [than Green] anyway. I'm going to feel fast. I still have to go and win it though.''
After making the weight, Cameron will take to the ring at about 94kg and is likely to have a considerable weight advantage over his 39-year-old Australian opponent.
He is excited about the prospect of his title shot but knows he will be under pressure to make his dominance obvious to the three judges - an Australian, a New Zealander and an American. A stoppage would be preferable.
"He's the golden boy over there. I don't really want to leave it to the judges. If I can put him to sleep in the first round, I will put him to sleep.''
His sensational fourth-round knockout of American Monte Barrett in Auckland in July proved he is capable of that too - as a heavyweight at least.
"That was one of the best feelings in my life. I finally got to prove that I am at that level. That was the easiest fight of my professional career too. I fought smart, I had a great training camp, everything went well, the fight plan, I just ticked all the boxes.''
