Lack of exercise is also a risk factor for heart disease but it's relatively small when compared with the others.

缺乏锻炼也是导致心脏病的一个因素。但和其他因素相比，这种危险较小。

《牛津词典》

He found that rats that exercise on a treadmill have raised levels of brain-derived neurotrophic factor coursing through their brains.

他发现，在跑步机上锻炼的老鼠，其大脑中流过的脑源性神经营养因子水平有所提高。

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Exercise is an important factor too.

锻炼也是一个重要因素。

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Weekly counseling on nutrition and exercise were a big factor, too.

CNN: FDA approves new diet drug

This is based on estimates of the impact on inactivity on coronary heart disease, Type 2 diabetes, and two specfic cancers - breast and bowel - where lack of exercise is a major risk factor.

BBC: Sedentary lifestyle can kill

In other words, marginal tax rates are just one factor in an options exercise strategy.

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