And the smaller the physical distance between friends, the larger the effect they had on each other's happiness.

VOA: special.2009.01.21

How many people know that three times a week physical exercise,30 minutes each time has the same effect ? as our most powerful psychiatric drugs?

多少人知道，每周三次,体育锻炼，每次三十分钟，与最强劲的精神药物,有同样的效果？

哈佛公开课 - 幸福课课程节选

He compared obesity rates and physical activity levels of women who had been in high school before and after Title Nine took effect.

VOA: special.2010.03.04

Ride 2 Recovery and Team RWB use the therapeutic effect of physical training to repair the physical and mental wounds of war.

WHITEHOUSE: The Changing Face of Veteran Reintegration

First, it has removed the physical impediment and refactored it with a combination of software and hardware that replicates the effect of the physical object at a higher level of functionality.

FORBES: Will Samsung S4 Beat Apple's iPhone To Become The U.S.' First Shopping Phone?

And it has a physical effect on brain function and transmission by altering chemical pathways, like those involving adenosine.

BBC: Coffee may prevent depression, scientists say