Isaac is trained by his father Jacob, who went over to the 2016 Rio Olympics as the assistant coach for the New Zealand team.
Jacob said Isaac had done a lot of work to get to Thailand, and not just in the gym.
"He's done fundraisers and gone on givealittle. During the last Christmas holidays he got basically a full-time job mowing lawns and yard work," he said.
"So he was doing a physical job and still doing all of his trainings. He did the hard work in the sun and then did incredibly hard work in the gym. He worked out how much he needed to make to get to Thailand and got it done."
Now Isaac is in the final stretch before heading to the competition, Jacob said they needed to get him above the 69kg mark which was his division's upper limit.
"Isaac's pretty good with his dieting. He actually needs to put on weight. He's in the 69kg weight class and he's at 68 right now," he said.
"When he gets to Thailand, he'll get dehydrated and with the plane ride as well he'll lose weight and when you lose that weight you get a bit weaker. So we need him around that 70kg mark.
"He's quite tall and has got no fat on him and burns off everything in the gym."
Isaac said he was quite lucky to be in the position he was with his weight.
"I have to put on a couple of kilos on before I get to Thailand. It's a pretty good spot to be in," he said.
"At least I don't have to lose weight!"
Isaac said his goals for 2017 were to break the New Zealand Under-17 records in his class, with an eye on one day heading to the Commonwealth Games and the Olympics.
Meanwhile, fellow Northlander Rory Taylor will continue his charge at Commonwealth Games qualification when he heads to Australia next week.
Taylor, who is a top lifter in the 105kg class, will lift at the Australian International in Melbourne and has a clear goal of what he wants to accomplish there.
"This competition is all about hitting those qualifying markers. We're not too worried about placings or anything like that," he said.
"We want to keep that number one ranking we've earned and look forward to the Oceania Championships.
"All this year is about is hitting those qualification markers and lifting enough to be selected going forward.
"We've finished all our heavy lifting for now so we're just slowing our preparations for the qualifying tournament."
