Key to the role is being a strong swimmer. In Adam's case, her pedigree as a national water polo representative saw her set the pace for much of last week's opening leg.
"If you're not there on the swim, you're not in the race," she insists. "When I first started triathlons, I'd never ridden a bike before, but picked that up pretty easily."
This month, the West Aucklander won the elite women's section of the Coromandel's K1 cycle event, so she knew she was up for a big performance on the bike. But since her sixth placing at last year's U23 world triathlon championships, a variety of leg injuries have seriously hindered any progress as a runner and that was always likely to be her downfall in Auckland. Her 43m 17s was the worst recorded on the Auckland 10km leg and seven minutes slower than her best.
"I did just enough running to get through this," she says. "The legs held up really well and I can now move on from here. I don't think I've scratched the surface of my ability as a runner yet."
After escorting Gemmell clear of the men's field, Davison also clocked one of the slowest run times (37m 01s), almost five minutes off his best, but he's also been hampered by a hip injury this year.
"My legs were pretty fried when I got off the bike, as everyone in New Zealand saw," the Cantabrian grins. "Running is definitely a weakness for me and that's one thing I'll be working on this summer.
"But when the opportunity arose to help Kris out on the bike, it was a no-brainer. We never talked about it before the race and it was unbelievable how it happened. You really don't see a plan work that well very often."
Next month, national triathlon coaches will muster their athletes together in Christchurch and explain their options over the coming 12 months. Adam and Davison, both 21, will probably have to decide whether they continue to excel at age-group level and set their sights for the 2016 Olympics, or step up to elite events now and chase selection for London.