Interesting. I learned some facial excersices long ago, from a cheapie little book from a thrift store. Hard to describe without illustrations, but I did them for years just for the heckuvit and it felt energizing. I do one still, maybe I’ll try to remember the others too:
Open eyes as wide as possible and raise eyebrows
Open mouth as wide as possible
Stick tonuge out as far as possible
Say AAAAAAHHHHHHHH loudly
repeat
it really sounds like the same exercise.
Oddly enough (???) I have hardly any wrinkles on face or neck despite being in mid 60s. Because I did those exericses? Or at least the last one? Or maybe because I’ve avoided tanning my whole life, with British Isles ancestor skin, the sun and I do not mix well.
Japanese television (NHK) has many TV shows that give instruction on all sorts of life-enriching, health strategies.
Let me give you more detail on this one.
The full instruction was to say the Japanese phonetic alphabet Ah, Ee, Uu, A, Oh, then Baaaaaaay (and the Baaay is where you stretch your tongue out.
And I think you can see that it works the different shapes of the mouth and tongue -- with the last part being probably the most important.
V K, I do this exercise at home when I'm on the Stairmaster machine -- same deal you're doing with the sit ups.
Let's be like Trump and TRiUMPh over old age!