The sport of swimming includes pool-swimming and open-water-swimming. Pool swimming is the act of swimming in a man-made pool in contrast to swimming in a natural-pool as a pond or a lake. Open-water-swimming is swimming in a natural pond or lake.
Swimming-pools are built typically either in-ground or can be above the ground. Swimming-pools are typically of all different sizes and shapes. An Olympic-size swimming-pool is typically a very large swimming-pool.
A swimming-pool is usually a part of a health-club or a resort or fitness-center. They are for the purpose of physical exercise and recreation. They are often a part of educational institutions, where students can enjoy a splash. Swimming-pools are also a part of holiday-venues, where people gather to have fun.
The earliest swimming-pool on earth is probably the one dug up in Mohenjo-Daro in Pakistan. It dates back to the 3rd millennium BC. The popularity of swimming as a sport was initiated by the inclusion of swimming races in modern Olympic Games when they were initiated in 1896.
Many contemporary swimming-pools have a heating system installed in them. This is to make the water-temperature comfortable enough to dip into. A cold swimming-pool can be quite dangerous to dive in. but these heaters make swimming quite a pleasant exercise.
Swimming helps the body develop a good and healthy cardiac cycle. It is one of the best ways to control weight. The exercise of swimming does push out a lot of calories from the swimmer and in this way, it improves the overall health. But swimming can also prove to be one of the most relaxing exercises.