After three years of parkour, Betty Boon said she could haul ⁠her own luggage up steep stairs in Japanese train stations, freeing her from ​reliance on her husband or son. Article continues after advertisementInterest in ​the classes, called Movement Singapore, has exploded recently, said coach Tan Shie ​Boon, who founded them in November 2017. Parkour is an intense discipline that teaches ​individuals how to fall and avoid debilitating injuries that could ​cause the ⁠elderly to lose confidence in their own mobility, he said. The contrast between a sport widely seen as very risky and the age of participants may have piqued ⁠the public’s ​curiosity, Tan said, after Movement Singapore’s Instagram page ​went viral. “Just keep proving to yourself that you can do more than you think you could,” ​he added.