With this logic, we can never reference any wisdom from the past.
For every quote, you can find an equal and opposite quote.
"Actions speak louder than words." vs "Pen is mightier than the sword."
"Many hands make light work." vs "Too many cooks spoil the broth."
It's like the bible, I can find a quote to justify pretty much anything. And then I can find a quote to denounce the same.
I think it's silly to advocate for physical activity with a quote. I think it's better to defend physical activity because it keeps you healthy physically and even mentally. I used to be a big quote collector ( from benjamin franklin to the bible ). I'm not any longer.
Actions vs words = talk vs doing something. Whereas the pen is the written word, which has great power especially over history.
Many hands improve work, but how many hands do you need on a broth? Further, a cook is the one who directs, whereas hands have no such connotation.