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.
Stretch your hamstrings following your elliptical workout with a standing forward bend. Stand with your feet together, bend at the hips and bring your torso toward your thighs. Place your hands on the floor next to your feet or on your shins if you are unable to reach the floor. Hold the stretch for 30 to 60 seconds.