Stand-up paddleboarding is an outdoor water sports activity in which a rider stands up on a large board and uses a paddle to move through the water. Stand-up paddleboarding, also known by the acronym SUP, is one of the fastest growing boardsports in the world. SUP is a subclass of paddleboarding, a broader concept that also includes the use of arms while kneeling, lying or standing on a narrow and long paddleboard to move around in the water. SUP quickly emerged as an accessible alternative and the industry quickly answered with the launch of hundreds of more-or-less surfboard-inspired models, which could be used in various situations. Today, SUPing can be enjoyed in flat oceans, surf areas, lakes, rivers, canals and inland waterways.