Laughter is a pressure valve which releases muscle tension.

大笑是一个压力阀，它可以释放肌肉紧张。

I don't know about muscle tension, attention deficit or heart rates.

我并不了解什么肌肉紧张，注意力不集中或者心率的问题。

Yoga normalization of muscle function. Excercise increase in muscle tension.

瑜伽使肌肉功能正常化，健身添加肌肉张力。

Other Benefits: lowering blood pressure, boost immunity, ease muscle tension.

其他优点：降低血压、提高免疫力、缓解肌肉紧张。

Progressive muscle relaxation reduces muscle tension and general mental anxiety.

渐进式肌肉放松法减少肌肉紧张，和总体上的精神焦虑。