And, of course, the review did not delve into how exercise could be influencing happiness.

当然，这篇论文综述没有深入探究锻炼是怎样影响幸福感的。

“There are indications that social factors could mediate the effects of exercise on happiness for some people,” Dr. Chen says. In other words, the social interactions that occur during an exercise class or trip to the gym might help to elevate people’s moods.

“有迹象表明，对某些人来说，社会因素可能是锻炼影响幸福感的中介因素，”陈蔚云说。换句话说，健身课程或前往健身房途中发生的社交活动可能有助于改善人们的情绪。

Or exercise could more directly change the body, including the brain.

锻炼也可能直接对身体产生影响，包括大脑。

“We know that exercise improves health,” Dr. Chen says, “and feeling healthier might make people feel happier.”

“我们知道锻炼可以改善健康，”陈蔚云说，“感觉更健康可能会让人感觉更快乐。”

Exercise might also remodel the brain, for example, by prompting the creation of new brain cells or inducing changes in brain chemicals, in ways that contribute to positive emotions.

锻炼有可能重塑大脑，例如促使大脑产生新的细胞，或促使大脑的化学物质发生变化，从而有助于产生积极情绪。

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