心动加速中枢

Bike riding is an excellent cardio exercise. 骑自行车是一项很好的锻炼心肺功能的运动。

You may as well just stick with the cardio. 你只是囿于这项训练中。

Do you work out at the gym, or do lots of cardio? 你有没有去健身房锻炼，或者做一些有氧运动？

WHAT ARE THE REASONS FOR SUDDEN ONSET OF CARDIO PALMUS? 突然发作心慌心跳究竟是怎么回事?

Even the walk from your car to the gym can become a cardio warm-up. 步行从您的汽车对体操可能成为心脏准备。