All games in competitive adult matches are best of five sets. Volleyball differs from other sports in that the first four sets are played to 25 points, while the fifth set is only played to 15 points if the match goes to a fifth set. In non-competition play, a set usually lasts about 30 minutes; a game lasts approximately an hour. There are several variations on the volleyball game that exist outside of competitive play. These include: beach volleyball, indoor volleyball, pool volleyball and standup paddleboarding (SUP). In beach volleyball, two teams of two players each hit a ball over netting to their opponent's team who try to get it into their court. Indoor volleyball is played on a carpeted floor with seven players per side. There are no walls to hit against, so indoor players use a jump shot or a spike for a high shot. Pool volleyball is similar to beach volleyball but without any netting between courts. Standup paddleboarding is growing in popularity among athletes who use their board like a surfboard to ride waves and charge down hills. Like volleyball, there are men's and women's divisions in SUP. Beach and indoor volleyball have become popular again after being abandoned for many years. Beach volleyball was popular in the 1950s and '60s but then disappeared until the early 2000s when it became popular again.