{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:11Z","timestamp":1791417611231,"version":"4.3.3"},"reference-count":40,"publisher":"Canadian Science Publishing","issue":"3","license":[{"start":{"date-parts":[[2011,6,1]],"date-time":"2011-06-01T00:00:00Z","timestamp":1306886400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Appl. Physiol. Nutr. Metab."],"published-print":{"date-parts":[[2011,6]]},"abstract":"<jats:p> The aim of the present study was to compare the time-course of indirect symptoms of exercise-induced muscle damage after 50 and 100 drop jumps. A high-force, low intensity exercise protocol was used to avoid discrepancies regarding metabolic fatigue immediately after exercise. Healthy untrained men performed 50 (\u201c50 group\u201d, n = 13) or 100 (\u201c100 group\u201d, n = 13) intermittent (30-s interval between each jump) drop jumps, respectively, from the height of 0.5\u00a0m with a counter-movement to a 90\u00b0 knee flexion angle and immediate maximal rebound. Voluntary and electrically evoked knee extensor strength was assessed using an isokinetic dynamometer immediately before and at 2\u00a0min after exercise, as well as 3, 7, and 14\u00a0days after exercise. Creatine kinase (CK) activity and muscle soreness within 7\u00a0days after exercise were also determined. The results showed that the decrease in voluntary isometric and isokinetic torque as well as 100\u00a0Hz stimulation torque at the end of the 50 and 100 drop jumps was very similar, while substantial differences were found in low-frequency fatigue, shift in optimal knee joint angle, muscle soreness, and CK activity. In addition, there was slower muscle strength recovery after the 100 drop jumps. It is concluded that the predictive value of strength loss immediately after exercise as an indicator of muscle damage decreases as the jump number increases. Still, stimuli must be large enough for muscle torque to reach the reduction plateau. Therefore, magnitude of exercise becomes a major factor in accuracy of muscle damage predictions. <\/jats:p>","DOI":"10.1139\/h11-023","type":"journal-article","created":{"date-parts":[[2011,5,20]],"date-time":"2011-05-20T21:56:10Z","timestamp":1305928570000},"page":"353-360","source":"Crossref","is-referenced-by-count":28,"title":["Predictive value of strength loss as an indicator of muscle damage across multiple drop jumps"],"prefix":"10.1139","volume":"36","author":[{"given":"Albertas","family":"Skurvydas","sequence":"first","affiliation":[{"name":"Sports and Movement Science Centre, Lithuanian Academy of Physical Education, Kaunas, Lithuania."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marius","family":"Brazaitis","sequence":"additional","affiliation":[{"name":"Sports and Movement Science Centre, Lithuanian Academy of Physical Education, Kaunas, Lithuania."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomas","family":"Venck\u016bnas","sequence":"additional","affiliation":[{"name":"Sports and Movement Science Centre, Lithuanian Academy of Physical Education, Kaunas, Lithuania."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sigitas","family":"Kamandulis","sequence":"additional","affiliation":[{"name":"Sports and Movement Science Centre, Lithuanian Academy of Physical Education, Kaunas, Lithuania."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"155","reference":[{"key":"refg1\/ref1","doi-asserted-by":"publisher","DOI":"10.1152\/physrev.00015.2007"},{"key":"refg2\/ref2","doi-asserted-by":"publisher","DOI":"10.1113\/jphysiol.2007.141838"},{"issue":"4","key":"refg3\/ref3","doi-asserted-by":"crossref","first-page":"1500","DOI":"10.1152\/jappl.1988.65.4.1500","volume":"65","author":"Bergstr\u00f6m M.","year":"1988","journal-title":"J.\u00a0Appl. 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