We all assume that putting mechanical tension on a muscle if done intensely enough and for long enough will cause hypertrophy. The next day that muscle is usually quite sore which indicates damage and hence possible growth.
Yesterday I had to shift two heavy wardrobes. Getting them into my ute was the easy part. Delivering them to my daughter's pad was a challenge. It was a long walk and the tension from the stretch was severe.
We did two trips and at the end it felt like a biceps workout. Today my biceps are quite sore. I had an arm workout three days ago so this must have been more intense.
It appears that it doesn't matter how we put mechanical tension on a muscle whether stretching or doing training. Of course, I remember the studies done on the chickens where a weight was attached to one wing.
The load was increased over a time and the hypertrophy in the weighted wing was impressive. Well, the only thing is stretching a muscle isn't exactly pleasant or fun. But I suppose if you held the weight in a stretched
position in curls, for example, that would help increase the amount of mechanical tension.