Curious if anyone here had additional context around this. Do calf raises have a similar effect? Do people with a habit of bouncing their calves while seated (essentially a soleus pushup as described in the article) have higher metabolisms on average?

It makes sense that a part of a calf muscle could have exceptional endurance, given the importance of walking in humans, but the article seems to say walking doesn't use it enough to activate the same effect. Maybe running?

The article makes some big claims and it would be interesting to see an independent review.