Lindsay Istace created Rage Yoga after going through a painful breakup. “My [yoga] practice is what got me through it,” Istace, 24, tells PEOPLE. “But I was hurt, confused and angry. This started to come out in my home practice. There was a lot of swearing and shouting in poses, and I found that it felt great to let it out on the mat!” The Canadian personal trainer joked about her unconventional home practice on Facebook, and one of her followers told her she should actually teach a “Rage Yoga” class.