{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T21:57:02Z","timestamp":1768082222747,"version":"3.49.0"},"reference-count":30,"publisher":"Human Kinetics","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,8,1]]},"abstract":"<jats:p>The objective of this study was to examine the influence of relative hamstring flexibility and lumbar extensor strength on lumbar flexion during a stoop lift. Lumbar flexion during stoop lifting has been associated with increased bending stress and load on the lumbar spine. The potential impairments that contribute to a flexed lumbar lifting posture during stoop lifting are unclear. Forty-nine healthy individuals (27 females and 22 males) between the ages of 18 and 40 participated. Strength of the lumbar extensors was measured with a motor-driven dynamometer, and relative hamstring flexibility was estimated with the passive knee extension test. Peak lumbar flexion and pelvis anterior rotation were quantified with 3D motion capture during a stoop lift. There was a positive correlation between relative hamstring flexibility and peak pelvis anterior rotation angle during the stoop lift (<jats:italic>r<\/jats:italic>\u2009=\u2009.544, <jats:italic>P<\/jats:italic>\u2009&lt;\u2009.001). Meanwhile, there was a negative correlation between middle lumbar spine peak flexion and relative hamstring flexibility (<jats:italic>r<\/jats:italic>\u2009=\u2009\u2212.538, <jats:italic>P<\/jats:italic>\u2009&lt;\u2009.001) and a negative correlation between lumbar extensor strength and lower lumbar peak flexion (<jats:italic>r<\/jats:italic>\u2009=\u2009\u2212.288, <jats:italic>P<\/jats:italic>\u2009=\u2009.045). Individuals with decreased strength and limited relative hamstring flexibility tended to exhibit increased lumbar flexion during stoop lifting.<\/jats:p>","DOI":"10.1123\/jab.2024-0191","type":"journal-article","created":{"date-parts":[[2025,4,21]],"date-time":"2025-04-21T05:42:35Z","timestamp":1745214155000},"page":"346-352","source":"Crossref","is-referenced-by-count":2,"title":["The Influence of Relative Hamstring Flexibility and Lumbar Extensor Strength on Lumbar and Pelvic Kinematics During a Stoop Lift"],"prefix":"10.1123","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5470-4044","authenticated-orcid":true,"given":"Christopher S.","family":"Patterson","sequence":"first","affiliation":[{"name":"Department of Physical Therapy, Azusa Pacific University, Azusa, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1765-9181","authenticated-orcid":true,"given":"Everett","family":"Lohman","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, Loma Linda University, Loma Linda, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6259-2270","authenticated-orcid":true,"given":"Robert","family":"Dudley","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, Loma Linda University, Loma Linda, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6863-1533","authenticated-orcid":true,"given":"Lida","family":"Gharibvand","sequence":"additional","affiliation":[{"name":"School of Allied Health Professions, Loma Linda University, Loma Linda, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9830-1183","authenticated-orcid":true,"given":"Skulpan","family":"Asavasopon","sequence":"additional","affiliation":[{"name":"Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, CA, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"100","reference":[{"issue":"1","key":"r1","series-title":"Arch Physiother","doi-asserted-by":"publisher","DOI":"10.1186\/s40945-022-00135-4","article-title":"The stoop-squat-index: a simple but powerful measure for quantifying whole-body lifting behavior","volume":"12","author":"Schmid S","year":"2022","unstructured":"Schmid S. 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