{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T12:11:52Z","timestamp":1792843912461,"version":"4.5.0"},"reference-count":10,"publisher":"BMJ","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br J Sports Med"],"published-print":{"date-parts":[[1989,9]]},"abstract":"<jats:p>The objectives of this study were to evaluate the effect of exercise on knee joint laxity. If exercise induced laxity is physiological, incorporation of this quality into a ligament replacement material would be indicated. Twenty recreational long distance runners average age 41 (range 24 to 50 yr) were tested before and immediately after 30 minutes of running. Using a computerized goniometer type instrument (Acufex KSS), knee flexion, axial tibial rotation and anterior-posterior tibial displacement were simultaneously recorded, while the runners underwent tests of static as well as dynamic knee joint laxity. At 30 degrees of knee flexion, a maximum increase of 16 per cent in mean total anterior-posterior laxity post-exercise was found. At the examination 30 minutes post-exercise, laxity at 30 degrees of knee flexion was still increased. However, laxity at 90 degrees of knee flexion had decreased to pre-exercise levels or below. Anterior tibial displacement, recorded during eccentric quadriceps activity (0 to 90 degrees of knee flexion) with weights attached to the foot, showed a maximum of 18 per cent increase in total anterior-posterior laxity post-exercise. It is suggested that the laxity increase is caused in part by a true ligamentous laxity increase, and in part by a decreased resting tone of the fatigued muscles.<\/jats:p>","DOI":"10.1136\/bjsm.23.3.165","type":"journal-article","created":{"date-parts":[[2008,12,16]],"date-time":"2008-12-16T00:55:24Z","timestamp":1229388924000},"page":"165-168","source":"Crossref","is-referenced-by-count":17,"title":["Exercise-induced knee joint laxity in distance runners."],"prefix":"10.1136","volume":"23","author":[{"given":"H V","family":"Johannsen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"T","family":"Lind","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B W","family":"Jakobsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K","family":"Kr\u00f8ner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[1989,9,1]]},"reference":[{"key":"ref_1","first-page":"433","article-title":"Mechanical behavior of tendon in vitro Med Biol Eng","volume":"5","author":"Abrahams, M.","year":"1967","unstructured":"Abrahams, M. 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The effects of exercise, ice, and ultrasonography on torsional laxity of the knee Clin Orthop 1983, 174, 172-180"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1177\/036354658000800105","article-title":"Cyclic loading in knee ligament injuries","volume":"8","author":"Weismann, D.; Pope, M.H.; Johnston, R.J.","year":"1980","unstructured":"Weismann, D., Pope, M.H., Johnston, R.J. Cyclic loading in knee ligament injuries Am J Sports Med 1980, 8, 24-30","journal-title":"Am J Sports Med"},{"issue":"74","key":"ref_7","first-page":"372","article-title":"Elasticity and tensile strength of the anterior cruciate ligament in rabbits as influenced by training","volume":"1968","author":"Viidik, A.","unstructured":"Viidik, A. Elasticity and tensile strength of the anterior cruciate ligament in rabbits as influenced by training Acta Physiol Scand 1968, 74, 372-380","journal-title":"Acta Physiol Scand"},{"issue":"175","key":"ref_8","first-page":"9","article-title":"The influence of physical activity on ligaments","volume":"165","author":"Tipton, C.M.; Mathes, R.D.; Maynard, J.A.","year":"1975","unstructured":"Tipton, C.M., Mathes, R.D., Maynard, J.A. et al. The influence of physical activity on ligaments and tendons Med Sci Sports 1975, 7, 165-175 9 Noyes, F.R. Functional properties of knee ligaments and alterations induced by immobilization Clin Orthop","journal-title":"and tendons Med Sci Sports; Functional properties of knee ligaments and alterations induced by immobilization Clin Orthop"},{"issue":"22-26","key":"ref_9","first-page":"11","article-title":"An in vivo strain gauge study of elongation of the anterior cruciate ligament","volume":"13","author":"Henning, C.E.; Lynch, M.A.; Glick, K.R.","year":"1985","unstructured":", 123, 210-258 10 Henning, C.E., Lynch, M.A., Glick, K.R. An in vivo strain gauge study of elongation of the anterior cruciate ligament Am J Sports Med 1985, 13, 22-26 11 Markolf, K.L., Bargar, W.L., Shoemaker, S.C. et al. 1981 The role of joint load in knee stability J Bone Joint Surg 1981, 63A, 570-585 12 Shermann, W.M., Armstrong, L.E., Murray, T.M. et al. Recovery of muscular strength, power, and work capacity following intense endurance exercise: The marathon Med Sci Sports Exerc 1982, 14, 135","journal-title":"Am J Sports Med; The role of joint load in knee stability"},{"issue":"3","key":"ref_10","volume":"23","author":"Sp, Br J.","unstructured":"Br. J. Sp. 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