What does Proverbs 31:17 mean?

The excellent wife (Proverbs 31:10) of this passage claims traits which benefit any person. Among those is a willingness to engage in hard, strenuous work. She does what needs to be done, rather than handing off important tasks to others (Proverbs 31:15) or simply doing nothing (Proverbs 31:27). Even if the work isn't glamorous (Proverbs 31:13), she applies herself with enthusiasm. She does not flinch from doing what is stereotypically considered "man's work;" the other tasks in this passage are not meant to define a "woman's job" in any narrow sense.

This lesson directly refers to work and diligence in one's effort. However, a broader application can also be given to those living in the modern world. This involves care for one's own health. Relatively speaking, ancient peoples worked harder for food and basic survival, while modern persons are more at risk of the dangers of progress. That can include unhealthy foods, excessive eating, lack of exercise, and so forth. A godly woman cares for herself and her "strength" as a necessary part of tending to her home and family.