Snowboard instructor Richie Johnston (29) says the decision to donate a kidney to his father, Rob Johnston, next month was an easy one to make.
What was harder was the doctors' recommendation he would need six to nine weeks to recover.
That did not fit with the Wanaka Rookie Academy instructor's peripatetic lifestyle.
Richie wants to return to Vancouver and his partner, Kenrae Dorsey, at the end of next month and be on the slopes of the Whistler skifield by mid-December.
So he has embarked on an intensive training programme to get fitter than ever to speed up his recovery.