Thanks for your comments @masummin50. Keep at it! Interval training (running a bit and then walking) is great for weight loss because it helps to keep your heart rate at the aerobic level. If you push it faster and get into the anaerobic level you'll be building muscle instead of losing weight. I'm not an expert, but I think that's how it works. You want to build some muscle in your legs of course. But it's good to pace yourself.
I used to be completely happy running for an hour. Now it's a challenge to run for 28 mins, but I know from experience that it gets easier with every run 😁