advice on my niche

I am a health and wellness coach setting up my coaching business. I would love some advice on honing my niche.

I help 45 to 55 year old women(suburban Philadelphia area) who are overwhelmed with the responsibilities of managing teenagers, aging parents and their jobs start taking better care of themselves. They are smart and know what to do but just can’t get themselves to do it. I help them prioritize their health to change eating and exercise habits so they can finally stop feeling guilty about not taking care of themselves, lose weight, have more energy and feel better, for good.