In ancient times, men spent the day hunting for game. Their task was then to haul it back to camp after they found and killed it. This was not easy and required them to expend a great deal of energy. Their muscle tone was good because they constantly used every muscle in their bodies to accomplish their hunting tasks. Women were also in good shape back then. Their job was to gather fruits and vegetables wherever they grew. They would also haul home the provender they found to feed the tribe.
Modern men and women no longer have to hunt or gather their food from the wild. This operation now takes place in local grocery stores where items are displayed and ready to consume. Keeping fit and healthy in the modern world requires effort. Eating right and joining a club to work their muscles is often the best solution for modern people.