发布网友 发布时间:2023-06-07 23:15
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热心网友 时间:2024-03-16 02:18
Roller skating is a recreation and a sport of gliding over a surface on roller skates, which have wheels built onto a special boot. Formerly, roller skates were made of metal wheels attached to frames that were clamped onto conventional shoes. An adaptation of ice skating, roller skating is popular throughout the world, especially in North America, Europe, and Australia, and has increased in general popularity since the 1930s with the building of indoor rinks. The introction in the 1970s of plastic, polyurethane wheels, which allow for greater freedom of movement and more intricate maneuvers, boosted the popularity of roller skating, both indoors and outdoors. Manufacturers borrowed further from the design of ice skates to proce in-line skates, also called Rollerblades after a principal manufacturer of the equipment. The wheels on in-line skates are aligned in a single row, and the faster, more agile skates became popular ring the late 1980s and early 1990s. Another modification of roller skates is the skateboard. Skateboards are small, narrow boards, about 60 cm (about 2 ft) long and 25 cm (about 10 in) wide, and are made of wood or a manufactured material such as plastic or fiberglass. The boards are mounted on four wheels and require balance to ride, in a technique similar to surfing.