Totally discouraged

PAV8888

You are at a normal weight with very little weight to lose.

You lose both lean and fat mass when you restrict calories.

The larger your deficit the more likely you are to lose non fat mass.

Furthermore, since you're past your late 20's, your body is systematically catabolic when it comes to muscle mass.

On top of that, unless you have a LOT of fat lying around (which you don't) and muscles which you haven't trained for a long time, you are not going to building muscle mass while losing weight. At best you will slow down muscle loss by exercising.

Muscle mass is a more important predictor of longevity than a low normal BMI. In fact, a low normal BMI is a predictor of lessened longevity compared to a slightly overweight BMI in the 26 to 27 range when it comes to people over 60.

You are already losing too fast which means you are, un-necessarily, losing lean mass.

Kindly set MFP to lose 0.5lbs a week and NET what it tells you to.

Including eating ALL your exercise calories back if your calories are primarily from walking or running and you weigh all your food on a digital scale in grams while making sure to pick database entries that you verify with outside sources such as the USDA database.

Otherwise just eat back 50% to 75% of your exercise calories depending on your hunger cues and re-evaluate in a few weeks based on your actual weight loss.

Start using a site such as www.trendweight.com, or www.weightgrapher.com, or a mobile app such as Libra for android and happy scale for iphone.

This will allow you to see your underlying weight change trend as opposed to being side-tracked by individual weight data points. Humans have a weight range, not an unchanging single point weight, and water weight changes are an order of magnitude larger than underlying fat/muscle changes.

Good luck... caloric restriction is not a place where new york impatience has a place