Table 2

Summary of included intervention studies

Author, year	FAIS group	Criteria	Sample	Intervention	Follow-up period	Controls	Sample	Comparability	Tasks	Reported differences in hip and pelvic kinematics and joint torques
Author, year	FAIS type	Criteria	Sample	Intervention	Follow-up period	Criteria	Sample	Comparability	Tasks
Brisson et al, 201323	Unilateral cam only FAIS	NR	n=10 7 men Age 29.9 (7.2)	Surgery (4 open, 6 combined)	Mean=21.1 (9.4) Range 10–32 months	NR	n=13 8 men Age 34.2 (9.9)	Age Sex BMI	Walking	Pre-operative versus post-operative No reported differences Pre-operative versus controls Patients with FAIS walked with: Less total frontal plane ROM
Lamontagne et al, 201135	Unilateral cam only FAIS	Aged 18–50 years old Positive impingement test Unilateral hip pain No signs of OA, combined FAIS or pincer α>50° (AP and Dunne X-ray)	n=10 7 men Age 29 (7.2)	Surgery (open and combined)	Range 8–32 months	–	–	–	Walking	Pre-operative versus post-operative No reported differences
Rylander et al, 201312	Cam, pincer and combined FAIS	Positive impingement and labral stress test No other lower limb, spine or back problems α>54° (MRI, cross-table lateral and AP X-ray) OR CEA>35° (MRI, cross-table lateral and AP X-ray)	n=17 12 men Age 35.4 (8.9)	Surgery (labrectomy or labral repair; +/−microfracture)	12 months	Self-reported lack of hip pain No lower limb injury history	n=17 12 men Age 34.9 (9.7)	Age Sex BMI	Walking Stairs	Pre-operative versus post-operative Walk: Post-operatively participants walked with: Greater hip sagittal and transverse plane ROM and greater peak hip flexion, and internal rotation angle Stairs: No reported differences Pre-operative versus controls Walk: FAIS group walked with: Less total sagittal, frontal and transverse plane ROM Smaller peak hip flexion, abduction and IR angle Stairs: FAIS group ascended stairs with: Less total sagittal plane ROM Smaller peak hip extension and IR angle Larger peak pelvic tilt Larger total pelvic rotation ROM

Age reported as means (SD).
AP, anterior-posterior; BMI, body mass index; CEA, centre edge angle; FAIS, femoroacetabular impingement syndrome; IR, internal rotation; NR, not reported; OA osteoarthritis; ROM, range of motion; α, alpha angle.