(5)Aerobics
有氧運動(健美訓練)
Aerobics classes are designed to tone muscle throughout the entire body and burn calories at the same time.They're particularly effective for weight loss，because the focus is on continuously moving and maintaining an elevated heart rate.In addition，you'll notice increased stamina in other aerobics 1 activities，such as walking，running，in-line skating and skiing.
Aerobics doesn't require any previous knowledge，because the instructor (either in a class or in a home video) will guide you through all parts of the workout，including the warm-up，stretching and cool-down.Because aerobics classes range from beginner to advanced levels，there's an option for people of every fitness level，and thanks to the large variety of classes，It's unlikely you'll get bored.Many people find motivation from being in a room with others，crediting the team spirit and loud music as incentive to finish the class.The psychological boost 2 is another plus： A recent study found that aerobic exercise helps improve mood and creativity.If you prefer to work out at home，there are thousands of fitness videos from which to choose.Many are also available for rent at your local video store，so you can try before you buy.
注釋：
1.aerobics有氧運動，增氧健身法
2.boost增加，上升
譯文
有氧運動(健美訓練)
有氧運動訓練班的目的在於使全身肌肉變結實，同時燃耗卡路裏。它對減輕體重特別有效，因為它著重在於持續運動和保持心率提高。此外，你會注意到其他有氧運動裏可以增強毅力，例如行走，跑步，滑冰，滑雪等。
有氧運動(健美訓練)不需要預先準備任何知識，因為教練(在訓練班或家庭錄像上)會在運動的所有步驟中進行指導，包括熱身運動，拉伸運動和放鬆運動。有氧運動訓練班包括各個級別，從初級班到高級班，各種健康狀況的人都可以作出合適的選擇。而且因為訓練班的多樣性，你不大可能感到厭倦。許多人從在一個大房間裏與他人一起運動找到動力，有人從相信集體精神和傾聽大音量的音樂中受到鼓勵。它的另一益處是對精神和心理有益。最近的研究發現有氧運動還有助於改善心情和創造力。如果你喜歡在家做運動，有成百上千的健身錄像帶供你選擇。在你家附近的錄像帶商店有很多錄像帶出租，你可以在購買之前先租來試一試。