Probably because you are focusing more on cardio than strength workouts like weight lifting. If you are going to a gym and not using weights in your workout, then definitely you are wasting your time. Further take short sprints rather than long running and look for HIIT (High Intensity Interval Training) plans on the internet.
It took you years to get that big; it will take years to lose it. Do not get discouraged. Stick to your regimen, and you will lose weight (assuming you don’t have a thyroid issue or other metabolic diseases). If you are consistent, the weight will come off. Plan on losing around a pound a week, though some weeks you might lose more or even gain some. Pay little attention to the scale and more attention to your clothes. It’s possible you’ve lost 3–5 lbs already, but have put on muscle, so the scale hasn’t moved. If you are getting stronger (measured months at a time, not day to day), you know it’s working. When weight training, you should be doing full body workouts with compound movements (multiple muscle groups). Arm curls are a waste of time for you. Your 5 “”must do” lifts are squats, bench, deadlifts, overhead presses, and rows. If you cannot safely do them, do a variation of them. You might not need added weights for squats, so don’t be afraid of doing body weight lunges, squats, etc,
How big are your servings? Apparently, it’s shouldn’t be any more than the size of your fist. Are you incorporating weight training into your routine? Increasing muscle will increase your metabolism. Try also increasing foods that will increase metabolism (eg chilli) and give Bikram Yoga a go…doing it every day for 30 days (with a good diet) will see the weight drop. Good luck!
You are lowing your base metabolic rate, placing yourself into starvation mode, and harming your digestion. Eat the suggested measure of calories, through sound nourishment, and keep on exercising. I was incidentally eating excessively couple of calories and didn’t begin getting thinner until the point that I settled that.
You mentioned that you have hit a wall with weight loss. Have you considered using other methods other than a body weight scale to track your progress? It is very possible that you are losing fat – you may be replacing that fat with muscle tissue, hence the reason why the scale numbers are not decreasing… (One pound of fat weighs the same as one pound of muscle.) You may also be losing inches. I am a personal trainer and holistic nutrition/lifestyle coach that has worked with many clients who have lost fat but the scale numbers stayed the same or even increased.