松紧 sōngjǐn tightness Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 做伸展运动可以帮助你避免姿势问题,改善血液循环,放松紧张的肌肉。 zuò shēnzhǎn yùndòng kěyǐ bāngzhù nǐ bìmiǎn zīshì wèntí, gǎishàn xuèyèxúnhuán, fàngsōng jǐnzhāng de jīròu. Doing stretches can help you avoid problems with posture, improve blood circulation and relax tense muscles. Source: CCMatrix