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.
Calf Stretch. 1  Sit with your feet out in front of you. 2  Hold one end of a sheet or towel in each hand, forming a loop. 3  Place the loop around your foot.  Pull your toes toward 1  you. Stop when you feel a comfortable stretch in your calf muscle.  Hold for 20 seconds, and repeat 5 more 1  times. Switch legs and repeat.