Short answer:Originally Posted by bwhiskey
It is easy to be addicted.....TO ANYTHING. Wehn you exercise, you have adrenaline and endorphines causing an energetic but euphoric state. I get heavily into this myself. When this is not present, you feel lower.
Think caffeine and sugar.
It is the same basic process.
This is because along with the effects from above, working out will cause more oxygen to hit all internal organs more efficiently as well as doing the same with the brain. -Hence a better thought process as well as better health. Taking the oxygen away really changes things.also, now i find that when i work out, i dont get the same high i used to. i do feel less down if i went in down, i come out better, but its not as strong as it used to be, its like ive built up a tolerance of sorts. but im nearly 40 now, and i cant really work out harder than i am already - i feel quite tired after a hard work out these days.
Also, when we get older, it takes LONGER to heal. Depending what you have done to yourself in the past, those organs and lungs may not be as good as they once were. What may have been an easy workout 10 years ago, may be overworking now. On top of all of this, if your stress is greater now, it amplifies this effect.