{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,6]],"date-time":"2026-06-06T05:00:57Z","timestamp":1780722057310,"version":"3.54.1"},"reference-count":28,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T00:00:00Z","timestamp":1780358400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background: Femoroacetabular impingement syndrome (FAIS) is a common cause of hip pain and functional limitation in young and physically active individuals. Although hip arthroscopy is an established treatment when conservative management fails, objective data on early postoperative changes in active hip range of motion (ROM) remain limited. This study aimed to evaluate changes in active hip ROM three months after arthroscopic treatment for FAIS using inertial measurement units (IMUs) and to investigate their relationship with patient-reported outcomes. Methods: A prospective cohort of forty-two patients (mean age 36 \u00b1 9 years; 64% male) undergoing hip arthroscopy for FAIS was assessed preoperatively and at a three-month follow-up. Active hip ROM\u2014including flexion, internal rotation, external rotation, and total rotation\u2014was measured using IMU sensors, while subjective outcomes were evaluated using the Hip disability and Osteoarthritis Outcome Score (HOOS). Results: Significant improvements were observed across all HOOS subscales at follow-up (all p &lt; 0.001). The HOOS Total score increased from 57 \u00b1 15 to 83 \u00b1 11. Clinical recovery, defined by the Minimal Important Change (MIC), was achieved by 74% of patients for Symptoms, 81% for Pain, 81% for ADL, 83% for Sport, and 67% for Quality of Life (QOL). Active hip ROM in the operated hip increased significantly for internal rotation (19.6\u00b0 \u00b1 11.9\u00b0 to 26\u00b0 \u00b1 8\u00b0), external rotation (37\u00b0 \u00b1 10\u00b0 to 40\u00b0 \u00b1 8\u00b0), and total rotation (57\u00b0 \u00b1 15\u00b0 to 67\u00b0 \u00b1 12\u00b0). Changes in hip flexion were not clinically meaningful (98\u00b0 to 100\u00b0), and no changes were observed in the non-operated hip. Spearman\u2019s analysis showed weak and inconsistent correlations between active ROM and HOOSs (r ranging from \u22120.34 to 0.31). Conclusions: Hip arthroscopy for FAIS leads to early improvements in both patient-reported outcomes and active hip mobility, particularly in rotational movements, although the relationship between ROM and subjective outcomes appears weak.<\/jats:p>","DOI":"10.3390\/jcm15114313","type":"journal-article","created":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T14:38:42Z","timestamp":1780411122000},"page":"4313","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Active Range of Motion in Non-Impingement Directions After Hip Arthroscopy for Femoroacetabular Impingement Syndrome"],"prefix":"10.3390","volume":"15","author":[{"given":"\u0141ukasz","family":"Sto\u0142owski","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery, Rehasport Clinic, 60-201 Poznan, Poland"},{"name":"Doctoral School, Poznan University of Medical Sciences, 60-812 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gino","family":"Kerkhoffs","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Amsterdam UMC, Academic Medical Center, Meibergdreeg 9, 1105 Amsterdam, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0555-2608","authenticated-orcid":false,"given":"Tomasz","family":"Piontek","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Rehasport Clinic, 60-201 Poznan, Poland"},{"name":"Department of Spine Disorders and Pediatric Orthopedics, University of Medical Sciences Poznan, 61-701 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1169","DOI":"10.1136\/bjsports-2016-096743","article-title":"The Warwick Agreement on femoroacetabular impingement syndrome (FAI syndrome): An international consensus statement","volume":"50","author":"Griffin","year":"2016","journal-title":"Br. 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Pain"}],"container-title":["Journal of Clinical Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2077-0383\/15\/11\/4313\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,6]],"date-time":"2026-06-06T04:12:50Z","timestamp":1780719170000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2077-0383\/15\/11\/4313"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,2]]},"references-count":28,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2026,6]]}},"alternative-id":["jcm15114313"],"URL":"https:\/\/doi.org\/10.3390\/jcm15114313","relation":{},"ISSN":["2077-0383"],"issn-type":[{"value":"2077-0383","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,6,2]]}}}