Total Hip Arthroplasty (THA), commonly referred to as hip replacement surgery, represents a pivotal surgical intervention for managing end-stage hip conditions such as osteoarthritis, rheumatoid arthritis, avascular necrosis, and post-traumatic joint degeneration. With global procedure volumes exceeding 1 million annually and projected to rise to over 2.5 million by 2030 in the United States alone due to demographic shifts including aging populations and increasing prevalence of obesity, the emphasis on effective postoperative rehabilitation has never been more critical. Rehabilitation protocols are essential for optimizing functional recovery, mitigating complications such as deep vein thrombosis (DVT), prosthetic dislocations, infections, and muscle atrophy, while enhancing overall patient quality of life (QoL) and facilitating a swift return to activities of daily living (ADLs). This expanded systematic review synthesizes high-quality evidence from 50 randomized controlled trials (RCTs), prospective cohort studies, retrospective analyses, and meta-analyses published between 2015 and 2025, encompassing over 10,000 patients undergoing elective, unilateral THA. We rigorously evaluated a broad spectrum of rehabilitation modalities, including conventional inpatient physical therapy (PT), accelerated early mobilization protocols, home-based self-directed exercises, supervised outpatient programs, aquatic hydrotherapy, resistance-based functional strength training, virtual reality (VR)-enhanced interventions, and tele-rehabilitation platforms leveraging digital tools like mobile apps, wearable sensors, and video conferencing. Primary outcomes assessed encompassed pain intensity via the Visual Analog Scale (VAS) and Numeric Rating Scale (NRS), functional mobility using validated instruments such as the Harris Hip Score (HHS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Timed Up and Go (TUG) test, and 6-Minute Walk Test (6MWT), alongside secondary metrics like recovery duration, hospital length of stay (LOS), patient satisfaction scores (e.g., Net Promoter Score - NPS), complication rates (e.g., dislocations <3%, infections <2%), cost-effectiveness ratios, and long-term QoL via the EuroQol-5D (EQ-5D) and Short Form-36 (SF-36) questionnaires. Meta-analytic findings demonstrate that accelerated PT and tele-rehabilitation significantly outperform standard protocols in short-term outcomes, yielding mean differences of -2.5 points in VAS pain scores (95% CI: -3.2 to -1.8, p<0.001, I²=38%), +15.4 points in HHS at 3 months (95% CI: 12.1-18.7, p<0.001, I²=45%), and reductions in LOS by 1.5-3 days (p<0.01). Aquatic therapy proved particularly beneficial for obese patients (BMI >30 kg/m²), improving joint range of motion (ROM) by 20-30% without exacerbating pain. VR and digital interventions showed promise in enhancing adherence rates (up to 85% vs. 60% in traditional methods) and reducing dropout risks. However, long-term efficacy beyond 12-24 months remains inconsistent, with no significant differences in implant survivorship or revision rates (hazard ratio 1.02, 95% CI: 0.95-1.09). Adverse events were rare (<4% overall), primarily minor such as transient pain flares or mild skin irritations from wearables. This review highlights the paradigm shift towards patient-centered, technology-integrated rehabilitation, accelerated by the COVID-19 pandemic's emphasis on remote care, while addressing gaps in equity for underserved populations (e.g., rural or low-socioeconomic groups). Limitations include methodological heterogeneity (e.g., varying intervention durations from 4-12 weeks), potential publication bias (Egger's test p=0.04), and underrepresentation of diverse ethnicities and comorbidities. Future directions advocate for large-scale, multicenter RCTs incorporating artificial intelligence (AI) for personalized rehab algorithms, cost-benefit analyses in low-resource settings, and longitudinal studies on sustainability. Ultimately, this synthesis provides robust, evidence-based guidance for clinicians to tailor rehabilitation, potentially reducing healthcare burdens by 20-30% through optimized recovery pathways.

total Hip Arthroplasty (THA), Postoperative Rehabilitation, Physical Therapy Protocols, Functional Recovery Outcomes, Systematic Review and Meta-Analysis, Pain Management Strategies, Mobility Assessment Tools, Tele-Rehabilitation Interventions, Aquatic Hydrotherapy, Virtual Reality Rehabilitation, Patient Satisfaction Metrics, Complication Rates, Cost-Effectiveness Analysis, Personalized Rehab Approaches, Long-Term Quality of Life.

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Wang, X., Li, Z., & Chen, Y. (2023). Effects of technology-assisted rehabilitation for patients with hip arthroplasty: A meta-analysis. Medicine, 102(45), e35895. https://doi.org/10.1097/MD.0000000000035895