Studying for long hours can be overwhelming, so it's good to have a distraction such as listening to music.

distraction 是由动词 distract（使分心）加上名词后缀 -tion 构成的名词，意思是"使人分心的事物"或"消遣、娱乐活动"。在这里指在学习之余用来放松心情的活动。