Which of the following strategies is least effective for preventing postoperative constipation?

Allowing prolonged bed rest is the least effective strategy for preventing postoperative constipation because physical inactivity significantly contributes to gastrointestinal issues, including decreased bowel motility. When patients remain in bed for extended periods, they are less likely to engage their abdominal muscles and intestinal function slows down, increasing the likelihood of constipation.

In contrast, encouraging hydration helps to soften stool and promote bowel movements, as adequate fluid intake is essential for digestive health. Promoting mobility stimulates gastrointestinal activity and aids in the natural process of moving food and waste through the digestive system. Administering stool softeners is beneficial as it directly affects stool consistency, making it easier for the patient to pass. Each of these strategies actively supports bowel health, unlike prolonged bed rest, which can lead to complications, including constipation and discomfort for the patient.