Yanking repeatedly for more microtears
Would manual tugging/yanking cause more microtears than just stretching? I tried it at about 3 hard yanks per second and it seems I can inflict more force since I don’t have to grip for long. It is more of a shock force, because your hand accelerates it may be equivalent to a large weight for a split second. Just like karate expert can break a block with a quick sharp blow but couldn’t do it by pushing on the block. I got the idea trying to stretch a plastic bag slowly and then by yanking it. The bag stretched evenly when done slow but showed more derformation and broke easier when yanked repeatedly. I did it for about an hour in total over 4 hours and it was sore after as though I had been hanging 10lb.