Unit 107：Plug in the circuit第107单元：来个“全套的健身训练”充充电吧People who combine quick stints of aerobic exercise and weight training,called circuit training,tend to lose more weight than those who do aerobics alone,studies show.研究显示，结合有氧运动与重量训练的所谓“全套训练”比只做有氧运动更有助于减肥。Many health clubs offer circuit training.许多健身中心都有提供这项训练。