in the best of health
Very healthy. Oh, Joanie's doing very well—she's really been in the best of health since her surgery. My dad's not in the best of health, so the doctors want to run a bunch of tests to find out what's going on.
*in the best of health
very healthy. (*Typically: be ~; get oneself ~.) Bill is in the best of health. He eats well and exercises. I haven't been in the best of health. I think I have the flu.