## 2 Methods
### Search Strategy  
A structured and systematic search was initially performed in MEDLINE via PubMed to identify relevant studies. The keywords and controlled vocabulary terms retrieved from the preliminary search results were then refined to develop a comprehensive search strategy. This refined strategy was subsequently adapted and applied across multiple databases, including the Cochrane Central Register of Controlled Trials (CENTRAL), Scopus, PEDro, and Web of Science, ensuring the broad coverage of the available literature. The database searches were completed on 23 January 2024, without restrictions on the publication date. The search strategy was adapted for each database to maximize relevant findings, prioritizing controlled vocabulary terms where applicable (e.g., MeSH terms in PubMed) and using keyword searches in databases without indexed subject headings. Below are the detailed search strategies tailored for each database:  
MEDLINE(PubMed):  
(\"Femoroacetabular Impingement Syndrome\" [MeSH] OR \"Femoroacetabular Impingement\" OR \"Hip Impingement\" OR \"FAI Syndrome\" OR \"FAI\" OR \"Femoroacetabular impingement syndrome\" [TIAB])AND (\"Physical Therapy Modalities\" [MeSH] OR \"Rehabilitation\" [MeSH] OR \"Physiotherapy\" OR \"Physical Therapy\" OR \"Exercise Therapy\" [MeSH] OR \"Therapeutic Exercise\" OR \"Manual Therapy\" [MeSH] OR \"Core Stability\" OR \"Motor Control Training\" OR \"Neuromuscular Training\") AND (\"Conservative Treatment\" OR \"Non-Surgical Management\" OR \"Non-Operative Treatment\" OR \"Rehabilitation Protocol\" OR \"Evidence-Based Rehabilitation\" OR \"Non-Surgical Intervention\" OR \"Exercise-Based Therapy\") NOT(\"Total Hip Arthroplasty\" [MeSH] OR \"Hip Replacement\" OR \"Surgical Procedure\" OR \"Case Reports\" [Publication Type])  
Cochrane Central:  
(femoroacetabular impingement OR FAI OR hip impingement OR femoroacetabular impingement syndrome) AND (physical therapy OR physiotherapy OR rehabilitation OR exercise therapy OR manual therapy OR therapeutic exercise OR motor control training OR core stability OR neuromuscular training) AND (conservative treatment OR non-surgical management OR rehabilitation protocol OR non-operative treatment OR evidence-based rehabilitation OR non-surgical intervention) NOT (arthroplasty OR hip surgery OR total hip replacement OR case reports)  
Scopus:  
TITLE-ABS-KEY (\"Femoroacetabular Impingement\" OR \"FAI Syndrome\" OR \"Hip Impingement\" OR \"Femoroacetabular impingement syndrome\") AND TITLE-ABS-KEY (\"Physiotherapy\" OR \"Rehabilitation\" OR \"Physical Therapy\" OR \"Exercise Therapy\" OR \"Manual Therapy\" OR \"Therapeutic Exercise\" OR \"Core Stability\" OR \"Neuromuscular Training\" OR \"Motor Control Training\") AND TITLE-ABS-KEY (\"Conservative Treatment\" OR \"Non-Surgical Management\" OR \"Non-Operative Treatment\" OR \"Rehabilitation Protocol\" OR \"Evidence-Based Rehabilitation\" OR \"Exercise-Based Therapy\")(femoroacetabular impingement OR hip impingement OR FAI syndrome) AND (physio-therapy OR physical therapy OR rehabilitation OR manual therapy OR therapeutic exercise OR exercise therapy OR core stability OR neuromuscular training OR motor control) AND (conservative treatment OR non-surgical management OR non-operative treatment OR rehabilitation protocol OR evidence-based rehabilitation OR functional training) NOT (surgery OR arthroplasty OR total hip replacement OR surgical intervention)  
Web of Science:  
TOPIC: (\"Femoroacetabular Impingement\" OR \"FAI Syndrome\" OR \"Hip Impingement\" OR \"Femoroacetabular impingement syndrome\") AND TOPIC: (\"Physiotherapy\" OR \"Rehabilitation\" OR \"Physical Therapy\" OR \"Exercise Therapy\" OR \"Manual Therapy\" OR \"Core Stability\" OR \"Neuromuscular Training\" OR \"Motor Control Training\") AND TOPIC: (\"Conservative Treatment\" OR \"Non-Surgical Management\" OR \"Rehabilitation Program\" OR \"Evidence-Based Rehabilitation\" OR \"Exercise-Based Therapy\")