When we were homeschooling high school, we used the book "Total Health" as our curriculum. We used both the Junior. High and the Senior High texts. My boys enjoyed them both. If you are buying just one, I would probably get the one that best matches the age of your child. If they are 9th grade or under, or possibly if they are highly sheltered and older, get the Junior High. If they are over 9th grade, or hang out with their youth groups, various secular kids, etc., then I might get the Sr. High version.
We chose to not get the workbooks, however. I needed them to learn the subject matter but I had many other high powered classes at that time, I did not want to have yet one more thing for them to be tested on. We were working on Latin and Biology and stuff back then, and it would have been simply excessive. Both times I utilized Total Health, I mixed it with their sporting activities to make it a PE credit. I didn't record Health separately on their transcript. With their sporting activities, I did have an SIMPLE 150 hours of PE, and I did give them a full credit, but they were doing soccer, swim team and baseball at the time.
If I had listed Total Health alone on the transcript, I think I would have assigned it 1/2 credit, mainly because even with the tests, I do not believe it would take the time for a full year at 1 hour a day to finish. In Washington State, we are expected to teach health at some stage in their lives, but they do not state when or how much, so I had no requirement as to it being a whole credit in high school. If you want to supplement for high school health to enable it to be a full credit, give some thought to taking a CPR or basic first aid course.
Total Health is a great book, and both of my boys enjoyed it. In fact, when I bought the first one, the kids wound up reading it on their own over summer before school actually began. It had a wonderful tone, and had a good harmony concerning conservative concerns as well as a number of the situations that Christian kids might experience at school or youth group.