{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,1]],"date-time":"2025-08-01T19:40:07Z","timestamp":1754077207652,"version":"3.41.2"},"reference-count":7,"publisher":"BMJ","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br J Sports Med"],"published-print":{"date-parts":[[1993,3]]},"abstract":"<jats:p>Isokinetic training and assessment of the knee joint has been the mainstay of rehabilitation, especially in patients with anterior cruciate ligament deficiency. Besides the original shin pad used, the antishear device was introduced by Johnson in 1982. This device has been shown biomechanically to prevent excessive anterior translation of force on the tibia during training. However, there is a need to compare the antishear device and the standard shin pad in the isokinetic assessment. Hence, the major objective of this study is to define, if any, the difference in patient assessment between the new double pad device and the old single shin pad. Ten subjects with no previous history of injury on either knee were tested with the Cybex Isokinetic Dynamometer. There were four men and six women and the mean age was 25.2 years. They were randomized into different test sequences with different shin pads at different speeds. Correlation and paired t tests (P) were performed to find out the correlation and difference between the two devices. There was significant difference in performance assessment between the two devices in knee extension (P &lt; 0.05) but no significant difference in knee flexion (P &gt; 0.05). There was also a high correlation (r &gt; 0.75) between the two devices. It is concluded that because of the significant difference of data generated between the two devices, it is important to select one single device with each patient during a series of testings.<\/jats:p>","DOI":"10.1136\/bjsm.27.1.49","type":"journal-article","created":{"date-parts":[[2008,12,15]],"date-time":"2008-12-15T19:55:24Z","timestamp":1229370924000},"page":"49-52","source":"Crossref","is-referenced-by-count":5,"title":["The Johnson antishear device and standard shin pad in the isokinetic assessment of the knee."],"prefix":"10.1136","volume":"27","author":[{"given":"C K","family":"Li","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K M","family":"Chan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S Y","family":"Hsu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P","family":"Chien","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M W","family":"Wong","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Y","family":"Yuan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1993,3,1]]},"reference":[{"key":"ref_1","first-page":"23","article-title":"Controlling anterior shear during isokinetic knee extension exercise. I Orthop Sports Phys Ther","volume":"4","author":"Johnson, D.","year":"1982","unstructured":"Johnson D. Controlling anterior shear during isokinetic knee extension exercise. I Orthop Sports Phys Ther 1982; 4: 23-31."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"304","DOI":"10.2519\/jospt.1986.7.6.304","article-title":"Clinical use of the Johnson anti-shear device. How and why to use it","volume":"7","author":"Malone, T.","year":"1986","unstructured":"Malone T. Clinical use of the Johnson anti-shear device. How and why to use it. J Orthop Sports Phys Ther 1986; 7: 304-9.","journal-title":"J Orthop Sports Phys Ther"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"298","DOI":"10.2519\/jospt.1986.7.6.298","article-title":"Validation of the Johnson anti-shear accessory as an accurate and effective clinical isokinetic instrument","volume":"7","author":"Timm, K.","year":"1986","unstructured":"Timm K. Validation of the Johnson anti-shear accessory as an accurate and effective clinical isokinetic instrument. J Orthop Phys Ther 1986; 7: 298-303.","journal-title":"J Orthop Phys Ther"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"284","DOI":"10.2519\/jospt.1988.9.8.284","article-title":"Comparison of the Cybex II standard shin adapter versus the Johnson anti-shear device in torque generation","volume":"9","author":"Epler, M.; Nawoczenski, D.; Englehardt, T.","year":"1988","unstructured":"Epler M, Nawoczenski D, Englehardt T. Comparison of the Cybex II standard shin adapter versus the Johnson anti-shear device in torque generation. J Orthop Sports Phys Ther 1988; 9: 284-6.","journal-title":"J Orthop Sports Phys Ther"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"49","DOI":"10.1177\/036354658901700108","article-title":"Tibiofemoral joint force during isokinetic knee extension","volume":"17","author":"Nisell, R.; Ericson, M.; Nemeth, G.; Ekholm, J.","year":"1989","unstructured":"Nisell R, Ericson M, Nemeth G, Ekholm J. Tibiofemoral joint force during isokinetic knee extension. Am J Sports Med 1989; 17: 49-55.","journal-title":"Am J Sports Med"},{"article-title":"Isolated Joint Testing and Exercise: A Handbook for using Cybex II and UBXT","year":"1980","key":"ref_6","unstructured":"Isolated Joint Testing and Exercise: A Handbook for using Cybex II and UBXT. Ronkonkoma, New York, USA: Cybex Division of Lumex, 1980."},{"issue":"1","key":"ref_7","article-title":"Sp Med","volume":"27","author":"Br, J.","year":"1993","unstructured":"Br J Sp Med 1993; 27(1)"}],"container-title":["British Journal of Sports Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bjsm.27.1.49","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,1]],"date-time":"2025-08-01T19:10:02Z","timestamp":1754075402000},"score":1,"resource":{"primary":{"URL":"https:\/\/bjsm.bmj.com\/lookup\/doi\/10.1136\/bjsm.27.1.49"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1993,3]]},"references-count":7,"journal-issue":{"issue":"1","published-online":{"date-parts":[[1993,3,1]]},"published-print":{"date-parts":[[1993,3]]}},"alternative-id":["10.1136\/bjsm.27.1.49"],"URL":"https:\/\/doi.org\/10.1136\/bjsm.27.1.49","relation":{},"ISSN":["0306-3674","1473-0480"],"issn-type":[{"type":"print","value":"0306-3674"},{"type":"electronic","value":"1473-0480"}],"subject":[],"published":{"date-parts":[[1993,3]]}}}