Nike Training has launched a new documentary series that explores "obsession with athleticism" and first up is four-time major champion and current world number one golfer, Rory McIlroy. He revealed to Nike that less than five years ago, he was unable to stand on one leg for longer than ten seconds and couldn't plank for more than 30. Four years and 14 tour wins later, McIlroy transformed his game and body with the help of his instructor Michael Bannon, caddie JP Fitzgerald and exercise physiologist Dr. Steve McGregor. He now makes sure to keep up his training regimen, staying fit and in the gym even throughout the annual golf season. Take a look at the clip below and be sure to check out what the Nike Golf athletes will be wearing during the first Major of the season.