Physical Education teacher? You might not like the job prospects/salary.
Look into the field of Public Health. It seems to align with your general interests/values (although it might be too administrative for your tastes). USF offers a Bachelor’s in Public Health. The Master’s in Public Health (MPH) seems to be the go-to path for many public health professionals, but have a look at the job prospects for the BS in Public Health, especially if further education beyond a bachelor’s degree is undesirable.
If you’re interested in the public health field, and if you can afford a master’s degree (time/money), and you can get admitted… they offer a Master’s in Public Health (MPH) with a concentration in Public Health Education. It’s a 20-month program, which would hopefully be manageable in your case. Your bachelor’s could be in psychology, anthropology, sociology, phys ed/exercise science, etc. You can get into an MPH with a business degree, too, but I believe other health or social science fields are preferred. A business degree is possible, but you’d have to be careful with grades, recs, and showing enough interest in public health (by doing a minor or other coursework in a health-related field, by volunteering, by doing an internship, etc.).
USF also offers an MPH with a concentration in Social Marketing (online program), as well as a 4-course Graduate Certificate in Social Marketing (online) which can be applied toward the MPH in Social Marketing. You’d probably have a good shot at this path with a BS in Marketing, but again, you’d want to add health-related courses (or a minor) where possible.
It sounds like a business degree would be a reasonable path for you, providing you have the pre-reqs and can get into the business college. The job/salary potential is there, you can potentially align the degree with your interest in health/exercise, and you can supplement the degree later on with additional study (as above with the MPH).
If you went with business, you could possibly add a health-related minor like Public Health or Health Education. (Apparently, the Health Education minor allows you to become a Certified Health Education Specialist, with additional time/work.) Either of these minors would be suitable if you had an MPH in mind at a later time, or if you simply wanted a better shot at a health-related business career. Other minors like Psychology or Nutrition could provide health-related content to your studies. Anyway, research whether you could fit a minor alongside a business major.