Ordered carrier SC500-AF, WOW, what a well built product! I've been a welder/fabricator for over 47 years using all forms of welding processes. I know quality workmanship, this has well designed construction and welding assembly.
But exercise also stimulates brain regions that are involved in memory function to release a chemical called brain-derived neurotrophic factor (BDNF). BDNF rewires memory circuits so they work better.
Doing exercise can release particular chemicals in our nervous system, and these chemicals produce a sense of gratification or pleasure. Exercise addiction can somehow be a part of dependence of the pleasure response. Extreme health problems and weight loss may be related as a result of exercise addiction.