iso·met·rics /ˌaɪsəˈmɛtrɪks/
  等容線; 管道安裝圖
  iso·met·rics /ˌaɪsəˈmɛtrɪks/ 名詞
  isometrics
       n : muscle-building exercises (or a system of muscle-building
           exercises) involving muscular contractions against
           resistance without movement (the muscles contracts but
           the length of the muscle does not change) [syn: isometric
           exercise]