I was losing well before I started running, and running can make it easier or more difficult. Easier because yes, you are burning more calories. More difficult because it is easy to overestimate your burns and overcompensate your intake (and as you get better, your HR decreases and you burn less). Looking at your past few days, I'd say you're not eating enough.

Currently, I eat about 2K for maintenance, plus I eat back some of my calories. I also did TDEE over the summer. It took me a while to figure out what I needed to eat in order to be happy, and also what my limits were so I wouldn't gain weight. Once I found that threshold, it's been smooth sailing since May. Haven't gained/lost an ounce.

I started walking and then running to lose weight and to take on new challenges (races) and I'd say I started losing slowly and consistently within the first three months or so. I am pretty conscious about what I eat, so I stayed consistent in my calories, but when I was strength training as well, there would be days where I was just ravenous. I called these my "T-Rex" days because I basically wanted to eat everything in sight.

Are you using a HRM at all? It's very easy to think or assume you're burning more calories than you actually are. I know people say on average it's about "100 calories per mile", but I'm so tiny that this doesn't apply to me - I burn closer to 70 calories per mile. Which means when I run 5 miles, I've earned myself just one extra bloody pancake! So sad.

I'm currently running about 30-35 miles a week (marathon training) and I have a very difficult time keeping the weight on. I also tend to lose my appetite after running long distances, go figure. Anyway, keep at it. Just give it some time, your body will adjust.

I lost the vast majority of my weight last year when I was exclusively running and eating about TDEE-500 calories, with some unlogged/cheat days here and there. When I started lifting more and started trying to run a smaller deficit, my loss slowed down significantly. You definitely need to track all your food and be careful that you aren't overestimating your burns. This fall, I am eating close to maintenance because I want to make sure not to lose too much LBM and I want to maximize my performance in races, so I haven't been losing much. It's really all about intake and not too terribly much about what you doing for exercise.

I lost the vast majority of my weight last year when I was exclusively running and eating about TDEE-500 calories, with some unlogged/cheat days here and there. When I started lifting more and started trying to run a smaller deficit, my loss slowed down significantly. You definitely need to track all your food and be careful that you aren't overestimating your burns. This fall, I am eating close to maintenance because I want to make sure not to lose too much LBM and I want to maximize my performance in races, so I haven't been losing much. It's really all about intake and not too terribly much about what you doing for exercise.

Thanks for the response According to the road map my
BMR is 1347
TDEE is 1852.
I have set my calories to 1500 to stay in between my BMR and TDEE.
50%carbs/25%protein/25%fat

When you calculated TDEE, did you include your estimated workouts? If so, then you should never eat more than 1852, or you will be bulking. 1852 gross would be maintenance.

With my job, my workouts (unfortunately) vary a lot week to week. Because I couldn't reliably know what I would do each week, I use MFP the traditional way. I calculated my TDEE based on no working out (apprx. 1800), then subtract whatever deficit I want (from July-Sept, -300 per day to lose about 1/2 to 2/3 lb per week). So it set it 1500. Then I eat back all my exercise calories.

You need to be careful about your calories, even with technological assistance. They can still be overestimated.