从轻微的心血管锻炼开始，走路，骑固定自行车，和游泳都是不错的例子。
Begin with light cardiovascular training. Walking, riding a stationary bicycle, and swimming are great examples.
所有的志愿者都在一个温暖的(室内温度在86华氏[30摄氏])实验室中骑固定自行车。
All of the volunteers rode stationary bikes in a physiology lab heated to a balmy 86 degrees.
他建议患者骑三轮车，或使用固定脚踏车或训练器——这是设备将公路自行车转变为原地脚踏车。
He recommends that patients ride tricycles, or use stationary bikes or trainers - devices that turn road bikes into stationary ones.
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