"You just sat there like a big bloody George Foreman, whereas these new boats you're crossing from side-to-side so you've got to be real agile.
"[Being agile is also needed because] you're doing 45 knots down-wind and it's hard enough to stand up let alone get around the boat. The other thing with these boats you're pretty much grinding non-stop, in the old ones you'd have maybe six big manoeuvres. Whereas these new boats you're constantly grinding because there are so many hydraulics. There's always something to grind."
McAsey noted while he didn't feel unsafe onboard, he had trimmed down compared to his last America's Cup campaign.
"Last [America's] Cup I was 122kg, and was about being as strong as you possibly could. I couldn't run, I was just too heavy whereas now the training is so different [and his weight being 115kg]," he said while explaining how each boat had a maximum crew weight of which he was not sure of the exact figure.
"The good thing with sailing is you do have quite a long life span in it, but the new boats, these catamarans, I won't last as long as you could in the past in the version five boats. There were guys still grinding in their 50s, but these ones you've got to be moving the whole time."
TVNZ will be running highlight packages or go online to cupinfo.com