I guess it’s a question of phrasing, are you spending on what is considered to be a net negative or are you investing. If it’s investment you’d expect some kind of a return. I “invest” in games as a way to zone out and meditate for a while, and I think most people would agree that sports equipment is “investing in your health”.
On that note that’s probably one of the purest investing-by-proxy you can do as not investing in your health is very likely to be hurting your wallet in the form of doctor visits later in life. Stitch in time and all that.