The country star credits his transformation into DILFhood to a “strict no-sugar, no-wheat, high-protein diet (think tuna or grilled salmon)” and training with martial arts expert Roger Yuan for an hour and a half three times a day. The previously “meh” singer also gave up drinking. “I drank a lot from my point of view and I needed to stop,” McGraw, 45, tells People in its new issue, out this Friday. “I felt quitting was something I needed to do. I didn’t feel I had any moral high ground with my kids in the long run.” Whatever works, babe. And this DEFINITELY works.