A personal trainer is inspiring the latest exercise fad ... by mimicking what dogs do.
Nathaniel Nolan faced a dilemma ... he wanted to stay fit, but high-intensity workouts caused intense joint pain. So what's a 31-year-old personal trainer to do ... run like a dog on all 4's.
That's what the Indianapolis dude calls it ... "all fours training." He scurries around on his hands and legs for hours a day ... and it's done wonders for him. Turns out it's really good strength training and it made him super flexible.