Torn muscles retract, and lose strength, structure, and tightness.撕裂的肌肉会收缩，丧失原来的力量、结构和紧实度。He felt some muscle tightness in his back.他觉得背部肌肉有点僵硬。Heart disease often shows itself first as pain or tightness in the chest.心脏病的前兆常常是胸口疼痛或憋闷。He felt a tightness in his chest.他感觉胸部有些不适。