Many parents struggle with offering the best advice to young adults. Common sense is often a good guide but in this case there are good arguments on both sides.
A recent study of university students reported an increase in back pain for students who were active but gave up their sport or activity at college. Many other studies show the benefits of regular exercise and activity for mood, sleep, and general health. These findings hold true for all ages from teens to older adults.
Finding ways to balance studies with activities is a key to success. Encourage your daughter to find the right blend that works for her without giving up one or the other.