Just "Breathing in I relax, breathing out I release.", releasing tension, releasing stress, release whatever one needs to, I release pain, even.

吸气，放松，呼气，释放，释放出紧张感，压力感，释放需要放出的，甚至是苦痛。

普林斯顿公开课 - 人性课程节选

One, it helps them relax and relieve stress, so this is perhaps the principal reason.

第一,它帮助人们放松 舒缓压力,这可能是主要原因

耶鲁公开课 - 聆听音乐课程节选