{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T16:37:20Z","timestamp":1789403840908,"version":"build-2803163510"},"reference-count":18,"publisher":"Korean Shoulder and Elbow Society","issue":"4","license":[{"start":{"date-parts":[[2021,11,26]],"date-time":"2021-11-26T00:00:00Z","timestamp":1637884800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["cisejournal.org"],"crossmark-restriction":true},"short-container-title":["Clin Shoulder Elbow"],"published-print":{"date-parts":[[2021,12,1]]},"abstract":"<jats:p>Background: Extensor muscle strengthening exercises with counterforce bands (EX) is a conventional conservative treatment for lateral epicondylitis (LE) of the elbow. In addition, polydeoxyribonucleotide (PDRN) or extracorporeal shockwave therapy (ESWT) has been recently used for tennis elbow.Methods: Sixty-three patients with chronic LE participated in this study and randomly allocated in three groups (G1: EX, G2: EX+PDRN injection, and G3: EX+ESWT). All of the three groups were taught to perform EX at the first out-patient department (OPD) visit. Group 2 was injected with 3 mL PDRN (5.625 mg\/3 mL), while group 3 received ESWT at the first OPD visit. Visual analog scale pain score, Mayo elbow performance score (MEPS), and ultrasonographic examination were checked before, 6 weeks, and 12 weeks after the treatments.Results: Overall functional scores and ultrasonographic findings in all three groups improved after treatment. The mean MEPS in group 2 improved more than groups 1 and 3 at 6 weeks (G1, 56.9&gt;62.4; G2, 54.3&gt;65.0; G3, 55.7&gt;62.6), and more than group 1 at 12 weeks (G1, 56.9&gt;67.9; G2, 54.3&gt;73.6). The mean depth of the common extensor tendon depth (CETD) on ultrasonography in group 2 increased more than groups 1 and 3 at 6 and 12 weeks (6 weeks: G1, 0.385&gt;0.386; G2, 0.332&gt;0.392; G3, 0.334&gt;0.357; 12 weeks: G1, 0.385&gt;0.409; G2, 0.332&gt;0.438; G3, 0.334&gt;0.405 [cm]).Conclusions: PDRN injections combined with EX exhibited a greater improvement in mean MEPS and mean CETD compared to EX only or EX combined with ESWT for LE within the 12 weeks follow-up.<\/jats:p>","DOI":"10.5397\/cise.2021.00290","type":"journal-article","created":{"date-parts":[[2021,12,1]],"date-time":"2021-12-01T01:35:29Z","timestamp":1638322529000},"page":"231-238","update-policy":"https:\/\/doi.org\/10.5397\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Comparison of the effectiveness of extensor muscle strengthening exercise by itself, exercise with polydeoxyribonucleotide injection, and exercise with extracorporeal shockwave therapy in lateral epicondylitis: a randomized controlled trial"],"prefix":"10.5397","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3751-2304","authenticated-orcid":true,"given":"Bum 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Sun","family":"Hong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3351","reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1007\/s10067-012-1939-y"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1177\/0363546512472975"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.5397\/cise.2019.22.4.227"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1097\/md.0000000000010809"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1016\/j.surg.2010.04.024"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1111\/j.1524-475x.2008.00361.x"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1177\/0963689718799040"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1007\/s10396-019-01002-9"},{"key":"ref9","first-page":"61","volume-title":"Keeping tennis elbow at arm's length: simple, effective strengthening exercises","author":"Nirschl","year":"1996"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1007\/s00402-017-2657-3"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1080\/00016470410001708190"},{"key":"ref12","first-page":"502","volume-title":"Efficacy of platelet-rich plasma as conservative treatment in orthopaedics: a systematic review and meta-analysis","author":"Franchini","year":"2018"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2004.015545"},{"key":"ref14","first-page":"1982","volume-title":"Extracorporeal shock wave therapy in the treatment of lateral epicondylitis: a randomized multicenter trial","author":"Haake","year":"2002"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.1177\/0363546503262806"},{"key":"ref16","first-page":"207","volume-title":"Extracorporeal shock wave therapy in patients with lateral 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