In my opinion, regarding the people's health and enormous decrease in fitness level, the main reason can be seen as drastically change in the community. Year after year people are becoming lazy. Since they are becoming lazy, they are not doing any exercise or anything that may help them to reduce weight, or become healthier they don't before. On the other hand, it's not fair to only blame people for this issue. The second reason is, that we are going against Mother Nature and this war has given some consequences towards humanity. Poisoning earth with chemicals, air and water pollution are making us sick through food. Those are the main reasons for me.