{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T11:58:07Z","timestamp":1775476687530,"version":"3.50.1"},"reference-count":52,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2023,1,26]],"date-time":"2023-01-26T00:00:00Z","timestamp":1674691200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Korea University","award":["K2208461"],"award-info":[{"award-number":["K2208461"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Patellofemoral pain syndrome (PFPS) is a common cause of anterior knee pain, and therapeutic exercises are recommended. During the COVID-19 pandemic, despite recommendations on the importance of telerehabilitation, insufficient studies have investigated functional outcomes between supervised rehabilitation and telerehabilitation in patients with PFPS. This study aimed to compare the muscle strength, muscle activation time, and patient-reported outcomes between supervised rehabilitation and telerehabilitation in female patients with PFPS. A total of 61 patients (supervised, n = 30; telerehabilitation, n = 31) participated. Muscle strength and activation time of the quadriceps and hamstrings were measured using an isokinetic device. Hip muscle strength was evaluated using a hand-held dynamometer. Patient-reported outcomes were measured using the visual analog scale (VAS) for pain, Kujala Anterior Knee Pain Scale (AKPS) for functional ability, and Tampa scale for kinesiophobia (TSK-11). No significant differences were found in muscle strength, muscle activation time, or patient-reported outcomes of the involved knees between the two groups (p &gt; 0.05). In addition, the rate of change in all parameters did not significantly differ between the two groups (p &gt; 0.05). Telerehabilitation, such as a home-exercise program supervised by physical therapists, may be as effective as supervised rehabilitation in improving functional outcomes in female patients with PFPS.<\/jats:p>","DOI":"10.3390\/ijerph20032233","type":"journal-article","created":{"date-parts":[[2023,1,27]],"date-time":"2023-01-27T01:27:58Z","timestamp":1674782878000},"page":"2233","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Comparison of Functional Outcomes between Supervised Rehabilitation and Telerehabilitation in Female Patients with Patellofemoral Pain Syndrome during the COVID-19 Pandemic"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7083-4700","authenticated-orcid":false,"given":"Jin Hyuck","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Sports Medical Center, Korea University College of Medicine, Seoul 02841, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ki Hun","family":"Shin","sequence":"additional","affiliation":[{"name":"Department of Sports Medical Center, Korea University College of Medicine, Seoul 02841, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gyu Bin","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Sports Medical Center, Korea University College of Medicine, Seoul 02841, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4704-3169","authenticated-orcid":false,"given":"Seiwook","family":"Son","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Korea University College of Medicine, Seoul 02841, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9370-3319","authenticated-orcid":false,"given":"Ki-Mo","family":"Jang","sequence":"additional","affiliation":[{"name":"Department of Sports Medical Center, Korea University College of Medicine, Seoul 02841, Republic of Korea"},{"name":"Department of Orthopaedic Surgery, Korea University College of Medicine, Seoul 02841, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"122","DOI":"10.1007\/s00167-004-0577-6","article-title":"Clinical classification of patellofemoral pain syndrome: Guidelines for non-operative treatment","volume":"13","author":"Witvrouw","year":"2005","journal-title":"Knee Surg. 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