I thought you might find this interesting. This paper references a lot of older papers that inspired my thinking about HST and the importance of mechanical load (without reference to effort).
Here's a link to full text.
https://www.mdpi.com/2073-4409/9/7/1658/htm
Here's a link to full text.
https://www.mdpi.com/2073-4409/9/7/1658/htm