The human race is a very dynamic race so much that their lives are littered with changes and adjustments in the way they conduct complete to day affairs. They have to adapt to these kind of changes with time. A number of these changes involve new inventions and better techniques.
Before, there was very little that man could do about the climate so he moved constantly. He also moved so that he could be able to get meals for survival. Your movement also meant he previously to keep changing housing.
With time, the idea of clothing came in place as well as from then onwards, life has never been the same for man. Ever since then, there have been several changes in the idea of clothing.
As time passes, changes were made towards the clothing and several colors and designs were made. The idea of imagination has pushed man to create several fabrics and this has made clothes quite dynamic.
Following your issue of breakthrough discovery of clothes was well established, there came a worry with variety of apparel. There being a lot of fabrics, colors and designs, the concept of naming came in spot. The naming and classification of these garments came after a while. Until then though, mad needed to ensure that he settles down with shelter, food and clothes available.
After a while, there came the need to maintain the body performing well so that several feats could be met easily. This is where the idea of physique fitness began to come up. This was married with the idea of amusement as well as fun. With time, that became apparent that some sort of clothing would have to be made for the enjoyment which had become sports activity. The custom sweat trousers almost automatically become the solution for people to defend their legs.
This is when and why the situation of athletics came into play. In the start, there were particular athletes who would use the sweatpants but with time, it became easier to have several people sporting the sweatpants irrespective of what game they were playing.
This gave birth to the athletics manufacturing giants who had been focused on producing these kinds of outfits for the athletes or whoever otherwise wanted to wear related outfits. By all means, the firms had to ensure that that they branded their items. As time passes, people began to wear these sports outfits as a form of style with the logo totally exposed and all.