A normal home pool is rarely long enough for serious swimming training. However, it is possible to make a device to assist in swimming training in a small backyard pool.
While swimming training is a great way to build cardio stamina, provide a good workout and build upper body muscle, swimming training doesn't burn fat.
The freestyle swimming stroke, or Australian Crawl, is the most efficient way for a human to move through the water. It was developed in Sydney in the late 1890s.