This study is focused on helping athletes with a common hip condition called femoroacetabular impingement (FAI) syndrome. FAI syndrome occurs when abnormal bone shapes around the hip joint cause friction during movement, leading to pain, reduced performance, and, over time, more serious injury. While this issue is well-studied in male professional athletes, little is known about how it affects female and collegiate athletes, or how to prevent it from worsening. In this study, athletes diagnosed with FAI syndrome will participate in a 12-week in-season exercise program designed to reduce pain, improve hip strength and movement, and help prevent further injury-all while continuing their regular sports training. Participants will be randomly assigned to either: * An exercise group (receiving the intervention), or * A time-and-attention control group (regular check-ins and education). At the end of the study, the control group will have the option to access the exercise program. The study will track changes in pain, physical performance, injury recurrence, and athlete satisfaction with the program. This research aims to improve how we manage hip injuries in athletes and help keep them active during the competitive season.
Study Rationale Femoroacetabular impingement (FAI) syndrome is a common source of hip pain in athletes participating in cutting, pivoting, and high-impact sports such as soccer, basketball, ice hockey, and ringette. It is characterized by abnormal contact between the femoral head and acetabulum, which may lead to cartilage damage, labral tears, and early osteoarthritis. While research has primarily focused on male professional athletes, there is limited evidence regarding the early management of FAI in younger, female, and collegiate athletes. Current management strategies often emphasize post-season rehabilitation or surgical interventions, limiting opportunities to explore conservative strategies that allow continued play during the competitive season. This randomized controlled trial (RCT) addresses that gap by evaluating a novel, in-season, 12-week exercise intervention designed to mitigate symptoms, maintain sport participation, and potentially delay or reduce long-term structural damage. Study Objectives 1. Evaluate the feasibility of implementing an in-season, supervised exercise program in athletes with FAI syndrome. 2. Explore preliminary effectiveness signals on functional outcomes and symptom progression. Study Design Participants diagnosed with FAI syndrome based on clinical evaluation and symptom history will be randomized to either the intervention or a time-and-attention control group. The intervention group will complete a structured neuromuscular and hip-specific rehabilitation program, while the control group receives educational support and a progressive mobility and recovery (PMR) option during the same 12-week period. Randomization ensures balanced comparison of feasibility and clinical endpoints. Intervention Protocol The 12-week intervention focuses on: * hip and core strength (e.g., isometric and isotonic exercises targeting hip flexors, abductors, adductors, and gluteals) * neuromuscular control (e.g., drills for dynamic stability, pelvic alignment, and functional control) * functional progression (e.g., graded loading to meet game demands) Participants complete the exercises a minimum of 3 times/week, and will be trained at the start of each phase in-person or remotely by a trained clinician. Exercise progression will occur after 4 weeks per phase. Compliance is monitored through weekly questionnaires. Control Group Protocol: Time and Attention Control + PMR Option The control group will not participate in the structured exercise program but will receive supportive follow-up and access to a three-phase progressive muscle relaxation (PMR) program (audio guided). This design ensures time and engagement are balanced across groups. The control group protocol includes: * scheduled check-ins every 4 weeks with the research team for education and monitoring * educational modules on injury prevention, load management, and hip health * access to a guided three-phase PMR program While participation in the PMR component is optional, it offers a low-intensity, restorative alternative without introducing strength training or neuromuscular drills that may overlap with the primary intervention. Control group participants are also offered the full exercise protocol following study completion. Significance This is one of the first studies to investigate an in-season, non-operative intervention for FAI syndrome in athletes during competitive play. It targets a high-risk group (female and collegiate athletes), with potential to: * fill a critical gap in early-stage, conservative management of FAI syndrome * inform future sport- and sex-specific injury prevention programs * guide clinical decision-making regarding rehabilitation timing and delivery Feasibility findings will guide future larger-scale studies, including refined criteria for participant selection, adherence support, and integration within team-based medical models.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
30
This 12-week, in-season exercise intervention is designed for athletes with FAI syndrome and consists of three progressive phases. Phase 1 (Weeks 1-4): Focus on neuromuscular re-education and motor control using low-load exercises to improve hip and core activation, alignment, and stability. Phase 2 (Weeks 5-8): Targeted strengthening with increased load and movement complexity, emphasizing single-leg control, endurance, and pelvic stability. Phase 3 (Weeks 9-12): Integration of dynamic control, proprioception, and sport-specific movement patterns to support return to performance. Exercises target gluteus medius, gluteus maximus, core musculature, and functional movement systems. Participants complete the program \>=3 times per week. Weekly questionnaires will monitor symptoms, adherence, and other management (e.g., physiotherapy).
Participants in the time and attention control group will complete a 12-week, three-phase progressive muscle relaxation (PMR) program based on the Jacobson method. Phase 1 introduces isolated muscle tensing and relaxing to build awareness of muscle tension and promote body-mind connection. Phase 2 focuses on sequential relaxation of muscle groups, enhancing control and reducing stress. Phase 3 transitions to full-body relaxation through guided breathing and visualization techniques. Sessions are practiced 2-3 times per week using audio guides, with weekly check-ins from study staff. Symptom response, adherence, and participant experience are tracked throughout the season.
Proportion of Agreement to Screening
the number of participants whom agree to be screened/the number of participants approached for recruitment
Time frame: up to 9 months - study time frame is 12 months, with the last participant able to enroll at month 9 to allow for 12 weeks of intervention
Eligibility Proportion
the number screened positive for inclusion (evidence of FAI syndrome)/number of participants who agreed to be screened (consented)
Time frame: up to 9 months - study time frame is 12 months, with the last participant able to enroll at month 9 to allow for 12 weeks of intervention
Consent Proportion
Number of participants screened positive and agreed to participate in intervention/number screened positive for inclusion
Time frame: up to 9 months - study time frame is 12 months, with the last participant able to enroll at month 9 to allow for 12 weeks of intervention
Randomization Proportion
The number of participants randomized/the number of participants screened positive and agreed to participate
Time frame: up to 9 months - study time frame is 12 months, with the last participant able to enroll at month 9 to allow for 12 weeks of intervention
Trial-Arm Selection Proportion
The number agreed to each trial arm after randomization/the number of participants randomized
Time frame: up to 9 months - study time frame is 12 months, with the last participant able to enroll at month 9 to allow for 12 weeks of intervention
Attrition Proportion
The number of participants who drop out of study/number of participants randomized in each arm
Time frame: up to 9 months - study time frame is 12 months, with the last participant able to enroll at month 9 to allow for 12 weeks of intervention
International Hip Outcome Tool (iHOT-33)
The International Hip Outcome Tool (iHOT-33) is a 33-item patient-reported outcome measure designed to assess the health-related quality of life for young, active individuals with hip disorders. It focuses on how hip problems impact their daily activities, sports, work, and overall well-being. The iHOT-33 is a valuable tool for initial assessments, post-operative follow-ups, and clinical studies related to hip conditions.
Time frame: 12 weeks
Copenhagen Hip and Groin Outcome Tool (HAGOS)
Patient-reported questionnaire designed to assess the impact of hip and/or groin problems on physical function and quality of life in young to middle-aged, physically active individuals.
Time frame: 12 weeks
Make (Isometric) Strength Testing of the Hip
Strength measures in the hip (N/kg) performed in flexion, abduction, adduction. Measures will be performed pre and post intervention.
Time frame: 12 weeks
Passive Range of Motion
Range of motion in degrees at the hip joint in flexion, internal rotation, abduction. Performed pre and post intervention.
Time frame: 12 weeks
Special Test Findings
Positive or negative findings on special tests in the hip which reproduce the pain of an injury (out of a maximum of 3). Performed pre and post intervention.
Time frame: 12 weeks
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