Physical activity is an important factor in maintaining fitness.

体育活动是保持健康的一个重要因素。

《柯林斯英汉双解大词典》

Some people might argue physical fitness wins the day for the players and teams, whereas, others believe a key factor in any sports activity is mental attitude.

一些人可能会认为身体健康对运动员和球队来说是最重要的，然而，另一些人认为任何体育活动的关键因素是精神状态。

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Take into account your age, your level of running intensity, your overall fitness and health and even your running course's difficulty factor when seeking your average running heart rate.

在你探寻你得最佳跑步心率时，要考虑到你的年龄，跑步强度，你整体的健康状况甚至与你跑步的路况等外界因素所会带来的影响。

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When we look carefully into the reasons behind their success, it is easy and appropriate to attribute it to the talent factor and physical fitness, yet many of the teams have these.

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To keep the form factor small but offer heart rate monitoring for fitness purposes to those who want it, the CORE 2 will give consumers the option to purchase an accessory strap with an embedded heart rate sensor.

ENGADGET: BodyMedia's CORE 2 armband tracks your health, or lack thereof