姑娘你年轻别把身体用旧
[gū niáng nĭ nián qīng bié bă shēn tĭ yòng jiù]
Girl, You're Young, Don't Wear Your Body Out cautions youth about preserving one’s health and energy. The implication here could refer to not wasting valuable time on trivialities or taking good care of physical well-being while being still young.