"A lot of people wouldn't normally run in a group, they would run by themselves, and they don't know what they're doing as a result," he said.
"You can't go out and go gung-ho, you can't just go for it. You're behind too many people. You have to have to get yourself into a good rhythm, and then you can just relax and enjoy the experience."
In the last week before the race, Mr Owens says participants should focus on controlled breathing in training runs, increase their carbohydrate intake from Wednesday to Friday, keep hydrated and find an electrolyte drink that suits them.
He recommends a good lunch and an evening snack the day the before the race, and a good measure of sleep should be sustained as it's "the best time for recovery".
Participants are discouraged from trying anything "new" on the day, including unfamiliar clothes, footwear, food or drinks.