Not according to https://numberresearch.xyz/info

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There are no units of exercise and no units of depression either.

In my opinion the best measure of exercise is perceived effort. So while you're asking for objective answers, I think a lot of this is inherently subjective.

The benchmark you're asking for is also ill-defined. For example: How frequently to be as effective as what type and what frequency of therapy?

This is a big part of whatmade me take up knitting as a hobby – one of the most rewarding things I’ve ever done.

As an avid knitter, I can confirm it really is. In practice there might be multiple knots as you change balls of yarn for example but topologically each sweater is just a very fancy knot.

In fact, the words are etymologically linked, they’re really just the same word! See https://www.etymonline.com/word/knit

> knit(v.)

> Old English cnyttan "to tie with a knot, bind together, fasten by tying," related to Old Norse knytja "bind together, form into a knot," Middle Low German knütten "to tie, knot," Old English cnotta "a knot," from Proto-Germanic knuttjan, from stem knutt-. Of brows, late 14c. Intransitive meaning "do knitting, weave by looping or knotting a continuous thread" (especially in reference to plain stitch) is from 1520s.

Death, and some science. That's it?