{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T06:26:51Z","timestamp":1773296811786,"version":"3.50.1"},"reference-count":14,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"1","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2022,2]]},"abstract":"<jats:sec>\n            <jats:title>Case description:<\/jats:title>\n            <jats:p>A 30-year-old person with a unilateral transtibial amputation (TTAmp) was assessed performing an Olympic-style back squat with an energy storage and return prosthetic foot.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Objective:<\/jats:title>\n            <jats:p>Determine joint-level movement strategies of an individual with TTAmp while performing an Olympic-style back squat.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Study design:<\/jats:title>\n            <jats:p>Case study design.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Treatment:<\/jats:title>\n            <jats:p>Back squat mechanics are evaluated in an individual with TTAmp by comparing the contribution of the ankle, knee, and hip joint to total positive and negative amputated and sound limb work.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Outcomes:<\/jats:title>\n            <jats:p>The hip joint was the greatest contributor to total positive limb work compared with the knee and ankle, respectively, in the amputated (55.0% hip vs. 30.8% knee, <jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.001; vs. 14.2% ankle, <jats:italic toggle=\"yes\">P<\/jats:italic> = 0.001) and sound limbs (52.2% hip vs. 38.9% knee, <jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.001; vs. 8.9% ankle, <jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.001). The hip joint was the greatest contributor to total negative limb work compared with the ankle in both the amputated (51.0% hip vs. 15.9% ankle, <jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.001) and sound limbs (47.3% hip vs. 10.0% ankle, <jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.001) and the knee in the amputated limb (51.0% hip vs. 32.5% knee, <jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.001). Ankle joint power demonstrated an atypical bimodal negative\/positive\/negative\/positive pattern.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion:<\/jats:title>\n            <jats:p>The individual with TTAmp used a hip-dominant joint strategy in both the amputated and sound limbs while demonstrating more potential to optimize the prosthetic foot\u2019s energy storage and return capabilities when performing a back squat.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1097\/pxr.0000000000000058","type":"journal-article","created":{"date-parts":[[2021,11,18]],"date-time":"2021-11-18T00:20:52Z","timestamp":1637194852000},"page":"50-53","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":2,"title":["Back squat mechanics in persons with a unilateral transtibial amputation: A case study"],"prefix":"10.1097","volume":"46","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0509-845X","authenticated-orcid":false,"given":"Kinyata J.","family":"Cooper","sequence":"first","affiliation":[{"name":"Department of Rehabilitation Sciences, Texas Tech University Health Sciences Center, Lubbock, TX"},{"name":"Department of Rehabilitation Medicine, Brooke Army Medical Center, Center for the Intrepid, JBSA Fort Sam Houston, TX"},{"name":"Extremity Trauma and Amputation Center of Excellence, JBSA Fort Sam Houston, TX"},{"name":"Oak Ridge Institute for Science and Education, Oak Ridge, TN"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9023-8095","authenticated-orcid":false,"given":"AuraLea","family":"Fain","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Brooke Army Medical Center, Center for the Intrepid, JBSA Fort Sam Houston, TX"},{"name":"Extremity Trauma and Amputation Center of Excellence, JBSA Fort Sam Houston, TX"},{"name":"Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6119-983X","authenticated-orcid":false,"given":"Walter","family":"Lee Childers","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Brooke Army Medical Center, Center for the Intrepid, JBSA Fort Sam Houston, TX"},{"name":"Extremity Trauma and Amputation Center of Excellence, JBSA Fort Sam Houston, TX"},{"name":"Department of Prosthetics and Orthotics, College of Health Sciences, Alabama State University, Montgomery, AL"},{"name":"Department of Rehabilitation Medicine, Uniformed Services University, Bethesda, 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