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来自维基百科，自由的百科全书
开合跳，北美称之为jumping jack，共和联邦国家称之为星跳（star jump），即像星星一样有五个角，人体的头、双手、双脚分别为五个角，通过双手双脚的开合跳动，算完成一次动作[1]。
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
