doing cardio 4x a week. Diet going as should be hitting 1300 calories daily.
Describe your cardio.
This is simple math. You consume 1300 calories daily. You must expend more than 1300 calories daily if you want to shed any fat at all. The average basal metabolic rate for a woman is 1493 calories. With age and certain conditions it can and does go lower. One of those conditions is dieting. There are studies showing that your basal metabolic rate can be reduced anywhere from 15-25% when restricting calories. Assuming the worst, a huge drop at 25%, this means that your basal metabolic rate could drop by 373 calories a day, which means your new BMR would be only 1119 calories.
1300 Eaten and drunk
1119 BMR
0181 calories extra adding to fat everyday.
181 calories times 7 days a week is 1,267 extra calories a week. That's about a pound of fat added to your body every three weeks, or 17-18 pounds of weight gain every year.
Is your cardio, performed four times a week, enough to burn an extra 1,267 weekly? Even if it is, this just means you will stay exactly the same weight, never losing or gaining. Do you see where I am heading with this?
Also, with the calories at 1300, which is very low, what makes up the calories? What is it you eat and drink? What are your macros? I think this is important.
Cycling carbs works, because it prevents the drop in BMR I described above. The high calorie, high carb day tricks the body into thinking there is plenty and shuts off the starvation mode that causes the BMR to drop, meaning your body will continue to burn calories at a higher rate even on your lower calorie low carb days.