In science, mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.The law of conservation of mechanical energy states that in an isolated system that is only subject to conservative forces the mechanical energy is constant.n science, mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object.
As with the standing shin stretch, the cross-over stretch is well-suited for pre- and post-running stretching. You can perform this stretch with or without shoes. Start standing with your feet together. Cross your right leg in front of your left leg and place the tops of your pointed right toes on the ground.
To prepare for a workout, the best policy is to perform dynamic stretches: light activity that raises your heart rate while readying your muscles for exercise. How To Stretch. After exercise, cool down and hold a given stretch only until you feel a slight pulling in the muscle, but no pain.e all know we should stretch, but far too many of us overlook this and choose to get on to the ânitty grittyâ instead â the exercise or the sports or the free running. But you may not be doing it because you donât know how, when, or even why stretching is important.