Muscle tension in mV?

In general, muscles work when calcium ions are released, which triggers muscle cells to contract. All cells contain inside them cytoskeleton. The cytoskeleton is composed of protein filaments. In the case of muscle cells, they are actin & myosin filaments. Sliding filament theory explains how tension & subsequently movement is achieved in muscles cells & collectively in a muscle organ. When actin &  myosin filaments slide past each other, they shorten internally, the shortening of these long cells internally are attached to tendons on either end of the cells which then attach to attachments sites or bones, if tension exceeds the load, the muscle organ will move bones like a lever, if the tension is insufficient to move bone, then only muscle tension will be produced.