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 Make lunch your main meal of the day. 2  Focus on high-quality protein, such as fish, tofu, lean beef, chicken or bread with cooked grain, along with fresh fruit. 3  Always eat a mid-afternoon snack. 4  Around three hours before your run, eat a snack of fruit or an energy bar together with half a pint of water.