As it follows with Newtonian physics, the more I sit lethargically, the more I will want to sit, and therefore lack energy and feel lethargic (Law #1)!
#2 - As I apply my willpower and desire daily, the momentum of change to my health, body, spirit, and mind will change commensurately.
And, #3, the more I run, the easier it gets!
The First Law states that objects at rest tend to remain at rest; objects in motion tend to remain in motion, unless they are acted upon by an external force. The Second Law states that an applied force on an object equals the rate of change of its momentum with time
The Third Law states that for every action, there is an equal and opposite reaction.
Here's to physics!