Snowboarding is a recreational activity and Winter Olympic and Paralympic sport that involves descending a snow-covered slope while standing on a snowboard attached to a rider's feet. The development of snowboarding was inspired by skateboarding, sledding, surfing and skiing. It was developed in the United States in the 1960s, became a Winter Olympic Sport at Nagano in 1998 and eventually was featured in the Winter Paralympics at Sochi in 2014. Its popularity (as measured by equipment sales) in the United States peaked in 2007 and has been in a decline since.