Many nursing positions will keep you up and running. So that part would be a good fit!
Personally, as a science junkie, I found some of the nursing coursework frustratingly cursory. You've got a very short time to cover A LOT of ground and a bulk of nursing education focuses on whole patient care including addressing psychosocial issues and preventative measures (encouraging hydration and ambulation, providing skin care, etc). I'm in no way diminishing the value of whole patient nursing care. Nursing *is* whole patient care. It's just that compared to major level science coursework, nursing coursework generally isn't so in depth.
Health care providers only spend a small fraction of their time chewing on the science of health care and spend the bulk of their time just "getting it done"... making sure labs are drawn, physicians notified, pain is controlled, bowels are working, etc and documenting, documenting, documenting! Of course, scientists by profession often spend the bulk of their time trying to get funding and to get published, and just a small fraction actually *doing* science (lab work, field work, etc)! I guess that's why we call it work... much of it is stuff we don't consider inherently fun.
Anyway... my main point is that the best reason to go nursing school is because you want to be a nurse and practice nursing. Any other goal (become a case manager, a mid-level primary care provider, a diabetes educator, a medical researcher) may be pursued without necessarily becoming a nurse.
If you want to be a nurse and a medical researcher, then definitely go with nursing school. But if you want to be a nurse in order to get into medical research, then you might consider just majoring in biology, kinesiology, microbiology, etc. Granted, you can't just open the paper for jobs for kinesiology majors as opposed to RN jobs (it's not that easy for RNs these days anyway), but if you're interested in non-mainstream nursing jobs, those are more difficult to land depending on what other skills/experience you bring to the table besides just the license.
If you're not really sure what direction you'd like to go, try to get out there and volunteer/intern on a hospital unit, in a research lab, at a pharmaceutical company, etc.