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.
1 Do a warm up before you run. 2  Use your arms, as the faster they go, then the faster your legs will go, and keep your hands open, not closed as this increase aerodynamics when sprinting. 3  Before you start running, practice jogging on the spot to warm up.4  Remember to keep your head straight and eyes forward. Run with a heavy backpack on and do sprints. 2  Then take off the backpack and do sprints. 3  Before you decide to make running a regular thing on your schedule, you may want to try a sport like skateboarding or skiing to strengthen your leg muscles. 4  Make sure your trainers are in good shape.