How Does a Muscle Contract?

So i studied muscle more from an engineering perspective and modelling perspective a but when you really understand the physiology, so how does a muscle contract? Well, you have an action potential. And he that action potential travels across the muscle fibre membrane. That causes the release of calcium. That calcium binds to traponen to allow the acton and myson to bind and actually create a cross bridge and force. So we are actually measuring muscle excitation, which precedes activation. It's the electrical signal rather than the cascade that occurs after that action. I'm so glad you answered that. I thought i was getting halft. All right, go ahead and ok.