**4.1 General considerations**

Early mobilization is a key component of hip surgery. Prolonged bed rest causes a series of adverse physiological effects, including increased insulin resistance, myopathy, reduced pulmonary function, impaired tissue oxygenation, and increased risk of thromboembolism. Safe and effective analgesia is a prerequisite to encourage postoperative mobilization. There is substantial evidence that early mobilization facilitates recovery after hip replacement [94].
