Celebrity trainer Darin “The Damn Trainer” McClary, mental health coach Brent Nahshon and “The Biggest Loser” finalist Tanya Winfield join forces to present the “Biggest Loser Challenge.” The 60-day weight loss program takes intensive personal training online with on-demand, online workouts and meal planning, plus live interactive coaching with Darin, Bren, and Tanya via video …