"After 11 years of the same movement [hurdling] I find the lifting easier. It is explosive and fun."
Miller says going to a CrossFit gym enabled her to make the transition.
"I love going into such a relaxed atmosphere. Rather than people posing in front of mirrors you get short, sharp sessions and a measured change to your body, if done safely.
"Sometimes weightlifting might not be perceived as the most glamorous sport because people think it means you're going to get big. It's a misunderstanding. I'm exactly the same size as I was as a track athlete, but in better shape if anything."
Patterson is the country's top lifter, having attended the last two Olympics. He took time off after the London Games to open his own CrossFit gym in Albany, seizing on the fitness zeitgeist. The 30-year-old says it's driving athletes into weightlifting.
"They're realising the skills involved using their mobility, rhythm and speed to create power. CrossFit was initially not taken that seriously but exposure on social media where the likes of smaller women around 60kg are doing these lifts makes the sport more accessible."
OWNZ high performance manager John Moss agrees.
"The CrossFit growth has been exponential. It's a worldwide craze rather than just a fad."
The Patterson-trained Pip Hale is a case in point. Hale came from gymnastics and is ranked fourth in the Commonwealth in the 53kg class. Strong performances at the national championships in Christchurch on October 4 and 5 and at the Commonwealth Championships at the end of November should have her in contention for Glasgow.
"Her background enables her to get under the bar fast," Patterson says. "You need that speed. Any hesitation and you will fail."
Moss believes with a bit more organisation and goal-setting OWNZ can build a legitimate system developing athletes from ages 15 to 25.
"We've got to be realistic with voluntary coaches and administration staff. Without taxpayer funding through High Performance Sport New Zealand, we're not going to win the numbers battle over the likes of rugby and league but we're working towards a more structured secondary schools programme to give us the talent we need. The youth Olympics are helping as a motivational tool.
"Ideally, elite athletes are 10 years in the making. You've got to be careful [about putting excessive strain on muscles too early]. If you've got a good coach there's nothing to worry about."