Loud laugh has become a healthy activity like jogging and Yuga.

大笑，与慢跑和瑜伽一样，已然成为健康运动。

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Hiking is a healthy activity. But one should always bear in mind his own safety.

行山远足是强身健体的活动，但必须注意安全。

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Every student is supposed to take up a sporting activity for a healthy life.

为了健康的生活，每个学生都应该参加体育活动。

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One could argue that social networking, at least at its core level, is a healthy activity: it contains human interaction, thoughtfulness and even a splash of compassion.

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She acknowledged her feelings, got support from someone who helped her reflect on her accomplishments and then allowed herself to enjoy a healthy activity that boosted her morale.

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And, believe me, the world will eagerly await what it has to say, not just because of Junior Seau, but because of the knawing realization that a supposed healthy activity could have unhealthy long-term effects.

FORBES: After Junior Seau, The Medical Report That Will Revolutionize Youth Sports