I was talking to these personal trainers at my university gym, (one guy is 250 pounds with 6 percent bodyfat). I was like what's the best way to lose weight. He's like stop doing cardio and start walking more. He was telling me that walking burns a lot more fat than doing cardio. He was like when you're doing cardio, when you go above a certain heartrate, like 120, ur body starts working ur heart and stops burning fat. He was like he never does cardio. I wonder what you guys think about this?