"My body was ready to go, I was hitting targets in my training and everything appeared to be on track. I felt the same, if not better than I have felt before other events."
Rajpal said the last thing she remembered was feeling light-headed.
"I pulled over to the side, paused my watch and then the world went black."
Rajpal is one of more than 2000 people in New Zealand who are treated for sudden cardiac arrest each year in the community.
The mother of two said she has so many people to thank for saving her life.
"As well as the first responders, I feel so grateful to the emergency workers, the ambulance and fire engine drivers who cared for me and transferred me to hospital - particularly the one which drove my kids to the hospital with our puppy on her lap so that my husband could stay with me."
She added that the nurses and doctors at Hawke's Bay Hospital were amazing, as well as the flight team who took her back to Tauranga.
Research undertaken by St John shows there is a 13 per cent chance of survival after cardiac arrest.
For every minute that goes by without CPR or using AED defibrillation the chance of survival drops by 10 to 15 per cent.
If you witness a cardiac arrest, you can increase the person's chances of survival by calling 111 immediately, doing CPR and using an automated external defibrillator.