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Water skiing is a surface water sport in which an individual is pulled behind a boat or a cable ski installation over a body of water, skimming the surface on two skis or one (slalom) ski. The sport requires sufficient area on a smooth stretch of water, one or two skis, a tow boat with tow rope, three people, and a personal flotation device. In addition, the skier must have adequate upper and lower body strength, muscular endurance, and good balance. Skiing is a fun pastime that allows people of all skill levels and ages to enjoy. There is no minimum age necessary to water ski. There are water ski participants around the world, in Asia and Australia, Europe, Africa, and the Americas.〔(【引用サイトリンク】 Regional Sites )〕 In the United States alone, there are approximately 11 million water skiers and over 900 sanctioned water ski competitions every year.〔(【引用サイトリンク】 USA Water Ski Profile )〕 Australia boasts 1.3 million water skiers.〔(【引用サイトリンク】 About Us )〕 There are many options for recreational or competitive water skiers. These include speed skiing, trick skiing, show skiing, slaloming, jumping, and barefoot skiing. Similar, related sports are wakeboarding, kneeboarding, discing, tubing, and sit-down hydrofoil. ==Basic technique== Water skiers can start their ski round in one of two ways: wet is the most common, but dry is possible. Water skiing typically begins with a deep water start. The skier enters the water with their skis on or they jump in without the skis on their feet, have the skis floated to them, and put them on while in the water. Most times it can be easier to put the skis on when they are wet. Once the skier has their skis on they will be thrown a tow rope from the boat, which they position between their skis. In the deep water start, the skier crouches down in the water while holding onto the ski rope; they are leaning back with their legs tucked into their chests, with skis pointing towards the sky and approximately of the ski out of the water. The skier can also perform a "dry start" by standing on the shore or a pier; however, this type of entry is recommended for professionals only. When the skier is ready (usually acknowledged by them yelling "go"), the driver accelerates the boat. As the boat accelerates and takes up the slack on the rope, the skier allows the boat to pull him/her out of the water by applying some muscle strength to get him/her into an upright body position. By leaning back and keeping the legs slightly bent, the skis will eventually plane out and the skier will start to glide over the water. The skier turns by shifting weight left or right. The skier's body weight must be balanced behind the feet or else the boat's force will pull the skier forward out of the skis. While being towed, the skier's arms should be slightly bent but still fully extended so as to reduce stress on the arms. The handle can be held vertically or horizontally, depending on whichever position is more comfortable for the skier. In addition to the driver and the skier, a third person known as the ''spotter'' or the ''observer'' should be present. The spotter's job is to watch the skier and inform the driver if the skier falls. The spotter usually sits in a chair on the boat facing backwards to see the skier. The skier and the boat's occupants communicate using hand signals (see the Safety section below). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Water skiing」の詳細全文を読む スポンサード リンク
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