{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T11:45:00Z","timestamp":1782301500262,"version":"3.54.5"},"reference-count":25,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2020,11,24]],"date-time":"2020-11-24T00:00:00Z","timestamp":1606176000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2020,11,24]],"date-time":"2020-11-24T00:00:00Z","timestamp":1606176000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2020,11,24]],"date-time":"2020-11-24T00:00:00Z","timestamp":1606176000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The purpose of this study was to evaluate concurrent validity of the heel\u2010rise work test performed with use of the heel as a surrogate for the center of body mass.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The study was a validity study performed on a prospective cohort of consecutive patients. Forty\u2010five patients were included in the study. The heel\u2010rise work test estimates the total work performed by repeated heel\u2010rises until fatigue. In this study, the heel\u2010rise work was assessed by the linear encoder and a motion capture system simultaneously for validation. The linear encoder was attached to the patient\u2019s heel and reflective marker was attached to the pelvis and heel. Student\u2019s paired <jats:italic>t<\/jats:italic>\u2010test, linear regression analysis and Bland Altman plots were used to estimate the measurement error of the linear encoder.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The heel\u2010rise work test overestimated the total work with 21.0% on the injured leg and 24.7% on the non\u2010injured leg. Student\u2019s paired <jats:italic>t<\/jats:italic>\u2010test showed no difference in measurement error between the limbs (n.s.). The linear regression analysis showed no difference in limb symmetry index between the two methods of heel\u2010rise work estimation (<jats:italic>a<\/jats:italic> (slope)\u2009=\u20091.00, <jats:italic>R<\/jats:italic>\u2009=\u20090.94, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The heel\u2010rise work test performed using the heel as a surrogate for center of body mass overestimates the total work with 21.0\u201324.7% compared to a gold standard but was able to precisely detect the relative difference between the limbs. The heel marker can be considered a valid measurement device for assessing relative differences between the limbs.<\/jats:p><\/jats:sec><jats:sec><jats:title>Clinical relevance<\/jats:title><jats:p>Clinical testing of injuries to the lower body using the heel\u2010rise work test is valid when using the relative difference between the limbs.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>I.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-020-06369-8","type":"journal-article","created":{"date-parts":[[2020,11,24]],"date-time":"2020-11-24T15:02:57Z","timestamp":1606230177000},"page":"1604-1611","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["The heel\u2010rise work test overestimates the performed work with 21\u201325% after an Achilles tendon rupture"],"prefix":"10.1002","volume":"29","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5829-6703","authenticated-orcid":false,"given":"Kristine Rask","family":"Andreasen","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Copenhagen University Hospital Hvidovre Hvidovre Denmark"},{"name":"<!--<label>3<\/label>--> Department of Orthopaedic Surgery, Sports Orthopaedic Research Center\u2010Copenhagen (SORC\u2010C) Copenhagen University Hospital Amager\u2010Hvidovre Hvidovre Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Swennergren","family":"Hansen","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Department of Physical and Occupational Therapy, Physical Medicine and Rehabilitation Research\u2010Copenhagen (PMR\u2010C) Copenhagen University Hospital Amager\u2010Hvidovre Hvidovre Denmark"},{"name":"<!--<label>3<\/label>--> Department of Orthopaedic Surgery, Sports Orthopaedic Research Center\u2010Copenhagen (SORC\u2010C) Copenhagen University Hospital Amager\u2010Hvidovre Hvidovre Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jesper","family":"Bencke","sequence":"additional","affiliation":[{"name":"<!--<label>4<\/label>--> Department of Orthopaedic Surgery, Laboratory of Human Movement Analysis Copenhagen University Hospital Hvidovre Hvidovre Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Per","family":"H\u00f6lmich","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Copenhagen University Hospital Hvidovre Hvidovre Denmark"},{"name":"<!--<label>3<\/label>--> Department of Orthopaedic Surgery, Sports Orthopaedic Research Center\u2010Copenhagen (SORC\u2010C) Copenhagen University Hospital Amager\u2010Hvidovre Hvidovre Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kristoffer Weisskirchner","family":"Barfod","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Department of Orthopaedic Surgery Copenhagen University Hospital Hvidovre Hvidovre Denmark"},{"name":"<!--<label>3<\/label>--> Department of Orthopaedic Surgery, Sports Orthopaedic Research Center\u2010Copenhagen (SORC\u2010C) Copenhagen University Hospital Amager\u2010Hvidovre Hvidovre Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2020,11,24]]},"reference":[{"key":"e_1_2_9_2_2","doi-asserted-by":"crossref","unstructured":"AufwerberS EdmanG Gr\u00e4vare SilbernagelK AckermannPWChanges in tendon elongation and muscle atrophy over time after Achilles tendon rupture repair: a prospective cohort study on the effects of early functional mobilization.Am J Sports Med(2020)10.1177\/036354652095667736354652095667732986466","DOI":"10.1177\/0363546520956677"},{"key":"e_1_2_9_3_2","doi-asserted-by":"publisher","DOI":"10.1177\/2325967120906522"},{"key":"e_1_2_9_4_2","first-page":"B4837","article-title":"Achilles tendon rupture; 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