One of the proposed mechanisms to explain the positive impact of post activation potential on muscle performance is that low intensity muscle contractions results in phosphorylation of myosin light chains (i. e., proteins located at the base of the myosin cross-bridge). this increased phosphorylation can increase muscle force production by

I believe that the increased phosphorylation can increase muscle force production by increasing the muscle's sensitivity to calcium. Muscle performance depends on the balance of post-activation potentiation and fatigue. Post-activation refers to a short-term improvement in performance as a result of using a conditioning exercise. 

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.