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.
Because you perform this stretch standing and while wearing running shoes, the standing shin stretch is a useful preparation and follow-up to your run. Hold onto a wall or railing for support. Shift your weight to your left leg and bring your right foot back. Point your right foot toward the ground and place the tops of your toes on the ground. Slide your right foot forward until you feel a stretch in the front of your shin. Hold the position for 20 to 30 seconds and repeat three times. Switch legs and stretch your left shin.