Training shoes or trainers are shoes used for active outdoor activities such as running. Trainers have been around for about 100 years or so. The earliest trainers were reportedly made at around the 18th century, when people started to develop interest in running. During the 19th century the all-leather spiked shoe came out for the need for shoes that can grip the ground and give good traction while running. It was during the 1800s when manufacturers started to attach rubber soles to shoes. Croquet players during this time were using rubber-soled shoes with canvas uppers. Because the rubber reduced the noise the feet made when walking, the shoes ultimately became known as sneakers.