I am just grinning ear to ear over this thread, because it literally runs right alongside my discussions on smooth muscle hypertrophy and the Bayliss Effect. I am still researching a bit more, but i believe that when smooth muscle becomes injured/fatigued due to micro tearing in either its diagonal muscular structure or perhaps its endomysium, it may cause a leak which allows extracellular calcium in, or perhaps the repeated bouts of stretching and high intensity leads to a large amount of calcium inside the cell which causes constriction, due to the fact that calcium activated the actin and myosin(thick and thin bands) causing contraction. If it were in fact the case, it would be of double benefit considering that when constricted, it would allow repair to occur, along with forcing the calcium out of the cell. either way. i will post everything. This rubber band effect i believe is an indicator for whether or not smooth muscle has healed after a bout of exercise. We shall see though guys!

