{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,2]],"date-time":"2026-11-02T16:30:32Z","timestamp":1793637032698,"version":"4.5.1"},"reference-count":44,"publisher":"Human Kinetics","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,11,1]]},"abstract":"<jats:p>\n                    <jats:italic>\n                      <jats:bold>Purpose<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    To assess the test\u2013retest reliability of in vivo Achilles tendon (AT) structure and mechanical properties in youth with obesity.\n                    <jats:italic>\n                      <jats:bold>Methods<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    Participants (11 males; 12 females; age: 12.00 [2.07]\u00a0y; body mass index\n                    <jats:italic>z<\/jats:italic>\n                    \u00a0score: 2.93 [0.59]) were assessed for AT (1) length, (2) cross-sectional area, (3) moment arm, (4) force, (5) deformation, (6) stress, (7) strain, (8) stiffness, (9) Young\u2019s modulus, (10) plantar flexor maximal isometric voluntary contraction, and (11) tibialis anterior co-activation. Reliability was assessed using the intraclass correlation coefficient, coefficient of variation, Bland\u2013Altman, standard error of the measurement, and minimum detectable change. The intraclass correlation coefficient values were classified as excellent (\u2265.90), good (\u2265.75 to\u2009&lt;.90), moderate (&gt;.49 to\u2009&lt;.75), and poor (\u2264.49). Moreover, the threshold for CV was set at\u2009&lt;\u200910% to be considered excellent.\n                    <jats:italic>\n                      <jats:bold>Results<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    The intraclass correlation coefficient ranged from .88 (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009&lt;\u2009.001) (AT stiffness) to .99 (\n                    <jats:italic>P<\/jats:italic>\n                    \u2009&lt;\u2009.001) (AT stress), while the CV ranged from 0.91% (AT length) to 9.98% (AT Young\u2019s modulus). Bland\u2013Altman (%) of mean bias ranged from 0.24% (AT length) to \u22126.65% (AT stiffness). The standard error of the measurement (%) ranged from 0.13% (AT length) to 2.96% (AT stiffness), and the minimum detectable change (%) of the mean ranged from 0.35% (AT length) to 8.20% (AT stiffness).\n                    <jats:italic>\n                      <jats:bold>Conclusion<\/jats:bold>\n                      :\n                    <\/jats:italic>\n                    The in vivo measurement of AT structure and mechanical properties showed a good to excellent degree of test\u2013retest reliability in youth with obesity.\n                  <\/jats:p>","DOI":"10.1123\/pes.2025-0127","type":"journal-article","created":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T17:03:38Z","timestamp":1790096618000},"page":"421-429","source":"Crossref","is-referenced-by-count":0,"title":["Test\u2013Retest Reliability of In Vivo Structure and Mechanical Properties of the Achilles Tendon in Youth With Obesity"],"prefix":"10.1123","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9128-2079","authenticated-orcid":true,"given":"Mauricio","family":"Inostroza-Mondaca","sequence":"first","affiliation":[{"name":"Doctorate Program in Rehabilitation Sciences, Exercise and Rehabilitation Sciences Institute, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile"},{"name":"Departamento de Kinesiolog\u00eda, Facultad de Artes y Educaci\u00f3n F\u00edsica, Universidad Metropolitana de Ciencias de la Educaci\u00f3n, Santiago, Chile"},{"name":"Unidad de Medicina del Deporte y la Actividad F\u00edsica, Hospital Dr Exequiel Gonz\u00e1lez Cort\u00e9s, Santiago, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7697-9700","authenticated-orcid":true,"given":"Luis","family":"Pe\u00f1ailillo","sequence":"additional","affiliation":[{"name":"Doctorate Program in Rehabilitation Sciences, Exercise and Rehabilitation Sciences Institute, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-2228-0322","authenticated-orcid":true,"given":"Gerson","family":"Neguiman-Nahuel","sequence":"additional","affiliation":[{"name":"Doctorate Program in Rehabilitation Sciences, Exercise and Rehabilitation Sciences Institute, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2035-3279","authenticated-orcid":true,"given":"Rodrigo","family":"Ramirez-Campillo","sequence":"additional","affiliation":[{"name":"Doctorate Program in Rehabilitation Sciences, Exercise and Rehabilitation Sciences Institute, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago, Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"6","key":"r1","series-title":"Int J Pediatr Obes","doi-asserted-by":"publisher","first-page":"458","DOI":"10.3109\/17477161003615583","article-title":"Defining obesity risk status in the general childhood population: Which cut-offs should we use?","volume":"5","author":"de Onis M","year":"2010","unstructured":"de Onis M, Lobstein T. 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