To simulate what feeling better is – try this simple exercise:
- First, take your left hand and place it over your mouth. Breathe.
- Second, take your right hand and pinch your nose closed.
- Try to breathe. Wait just a few moments.
- Now release hands from your face.
If you are like most people, you were quick to remove your hands from your nose and mouth and wanted to resume your breathing normally, right? Why? Because your breathing became labored. It became uncomfortable to be without your normal supply of oxygen.
That simulates how a body does not regularly exercise has to labor for basic bodily functions as compared to a body that is regularly exercised and basic bodily functions (in this case breathing) are performed with ease.
In an unfit person, the heart and lungs have to work harder to provide and deliver oxygen to all the tissues and organs of the body. And if this body has low muscle mass (muscles are body tools, they do the work for you), there is additional stress from carrying around extra, non-productive mass (fat).
Through this simple simulation, it shows that a fit person feels good through the extra oxygen gained from regular exercise.