{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T18:41:52Z","timestamp":1760121712167,"version":"3.41.2"},"reference-count":26,"publisher":"BMJ","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Br J Sports Med"],"published-print":{"date-parts":[[1999,8]]},"abstract":"<jats:p>OBJECTIVES: Peak torque expresses a point output which may, but does not always, correlate well with full range output measures such as work or power, particularly in a rehabilitating muscle. This study evaluates isokinetic performance variables, particularly (a) flexor to extensor work and power output ratios of upper and lower extremities and (b) overall upper to lower extremity work and power ratios, in intercollegiate athletes. The purpose was to ascertain how speeds of 30 and 180 degrees\/s influence agonist to antagonist ratios for torque, work, and power and to determine the effects of these speeds on upper to lower limb flexor (F), extensor (E), and combined (F + E) ratios, as a guide to rehabilitation protocols and outcomes after injury. METHODS: Twenty seven athletic men without upper or lower extremity clinical histories were tested isokinetically at slow and moderately fast speeds likely to be encountered in early stages of rehabilitation after injury. Seated knee extensor and flexor outputs, particularly work and power, were investigated, as were full range elbow extensor and flexor outputs. The subjects were morphologically similar in linearity and muscularity (coefficient of variation 4.17%) so that standardisation of isokinetic outputs to body mass effectively normalised for strength differences due to body size. Peak torque (N.m\/kg), total work (J\/kg), and average power (W\/kg) for elbow and knee flexions and extensions were measured on a Cybex 6000 isokinetic dynamometer. With respect to the raw data, the four test conditions (F at 30 degrees\/s; E at 30 degrees\/s; F at 180 degrees\/s; E at 180 degrees\/s) were analysed by one way analysis of variance. Reciprocal (agonist to antagonist) F to E ratios of the upper and lower extremities were calculated, as were upper to lower extremity flexor, extensor, and combined (F + E) ratios. Speed related differences between the derived ratios were analysed by Student's t tests (related samples). RESULTS: At the speeds tested all torque responses exhibited velocity related decrements at rates that kept flexor to extensor ratios and upper to lower extremity ratios constant (p &gt; 0.05) for work and power. All upper extremity relative torque, work, and power flexion responses were equal to extension responses (p &gt; 0.05) regardless of speed. Conversely, all lower extremity relative measures of torque, work, and power of flexors were significantly lower than extensor responses. In the case of both upper and lower extremities, work and power F to E ratios were unaffected by speed. Moreover, increasing speed from 30 to 180 degrees\/s had no effect on upper to lower extremity work and power ratios, whether for flexion, extension, or flexion and extension combined. CONCLUSIONS: Peak torque responses may not adequately reflect tension development through an extensive range of motion. Total work produced and mean power generated, on the other hand, are highly relevant measures of performance, and these, expressed as F to E ratios, are unaffected by speeds of 30 and 180 degrees\/s, whether for upper or lower extremities or for upper to lower extremities. In this sample, regardless of speed, the upper extremity produced 55% of the work and 39% of the power of the lower extremity, when flexor and extensor outputs were combined. Injured athletes are, in the early stages of function restoration, often not able to exert tension at fast speeds. An understanding of upper to lower extremity muscular work and power ratios has important implications for muscle strengthening after injury. Knowledge of normal upper to lower extremity work and power output ratios at slow to moderately fast isokinetic speeds is particularly useful in cases of bilateral upper (or lower) extremity rehabilitation, when the performance of a contralateral limb cannot be used as a yardstick.<\/jats:p>","DOI":"10.1136\/bjsm.33.4.250","type":"journal-article","created":{"date-parts":[[2008,12,31]],"date-time":"2008-12-31T18:10:53Z","timestamp":1230747053000},"page":"250-254","source":"Crossref","is-referenced-by-count":12,"title":["Effects of velocity on upper to lower extremity muscular work and power output ratios of intercollegiate athletes."],"prefix":"10.1136","volume":"33","author":[{"given":"J","family":"Charteris","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1999,8,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"277","DOI":"10.1113\/jphysiol.1935.sp003318","article-title":"Muscular force at diVerent speeds of shortening","volume":"85","author":"Fenn, W.O.; Marsh, B.S.","year":"1935","unstructured":"Fenn WO, Marsh BS. Muscular force at diVerent speeds of shortening. J Physiol (Lond) 1935;85:277\u201397.","journal-title":"J Physiol (Lond)"},{"issue":"26","key":"ref_2","first-page":"136","article-title":"The heat of shortening and the dynamic","volume":"1938","author":"Hill, A.V.","unstructured":"Hill AV. The heat of shortening and the dynamic constants of muscle. Proc R Soc Lond B Biol Sci 1938;26:136\u201395.","journal-title":"constants of muscle. Proc R Soc Lond; B Biol Sci"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"750","DOI":"10.1152\/jappl.1981.51.3.750","article-title":"Training induced alterations of the in-vivo force-velocity relationship of human muscle","volume":"51","author":"Caiozzo, V.J.; Perrine, J.J.; Edgerton, V.R.","year":"1981","unstructured":"Caiozzo VJ, Perrine JJ, Edgerton VR. Training induced alterations of the in-vivo force-velocity relationship of human muscle. J Appl Physiol 1981;51:750\u20134.","journal-title":"J Appl Physiol"},{"key":"ref_4","first-page":"154","article-title":"The eVect of position and movement velocity on isokinetic force output at the knee","volume":"22","author":"Charteris, J.; Goslin, B.R.","year":"1982","unstructured":"Charteris J, Goslin BR. The eVect of position and movement velocity on isokinetic force output at the knee. J Sport Med Phys Fitness 1982;22:154\u201360.","journal-title":"J Sport Med Phys Fitness"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"435","DOI":"10.1152\/jappl.1984.57.2.435","article-title":"Muscle architecture and force-velocity relationships in humans","volume":"57","author":"Wickiewicz, T.L.; Roy, R.R.; Powell, P.L.","year":"1984","unstructured":"Wickiewicz TL, Roy RR, Powell PL, et al. Muscle architecture and force-velocity relationships in humans. J Appl Physiol 1984;57:435\u201343.","journal-title":"J Appl Physiol"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1007\/BF00713506","article-title":"Eccentric and concentric torquevelocity relationships during arm flexion and extension","volume":"60","author":"Hortobagyi, T.; Katch, F.I.","year":"1990","unstructured":"Hortobagyi T, Katch FI. Eccentric and concentric torquevelocity relationships during arm flexion and extension. Eur J Appl Physiol 1990;60:395\u2013401.","journal-title":"Eur J Appl Physiol"},{"key":"ref_7","article-title":"Isokinetic exercise and assessment","author":"Perrin, D.H.","year":"1993","unstructured":"Perrin DH. Isokinetic exercise and assessment. Champaign: Human Kinetics Publishers, 1993."},{"key":"ref_8","first-page":"491","article-title":"The human elbow and knee: functional relationships and phylogenetic considerations","volume":"54","author":"Goslin, B.R.; Charteris, J.","year":"1982","unstructured":"Goslin BR, Charteris J. The human elbow and knee: functional relationships and phylogenetic considerations. Hum Biol 1982;54:491\u2013500.","journal-title":"Hum Biol"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1661","DOI":"10.1080\/00140138508963302","article-title":"Upper to lower body muscular strength and endurance ratios for women and men","volume":"28","author":"Falkel, J.E.; Sawka, M.N.; Levine, L.","year":"1985","unstructured":"Falkel JE, Sawka MN, Levine L, et al. Upper to lower body muscular strength and endurance ratios for women and men. Ergonomics 1985;28:1661\u201370.","journal-title":"Ergonomics"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1249\/00003677-198600140-00009","article-title":"Physiology of upper body exercise","volume":"14","author":"Sawka, M.N.","year":"1986","unstructured":"Sawka MN. Physiology of upper body exercise. Exerc Sport Sci Rev 1986;14:175\u2013211.","journal-title":"Exerc Sport Sci Rev"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"149","DOI":"10.2519\/jospt.1991.14.4.149","article-title":"Torque characteristics of the quadriceps and hamstring muscles during concentric and eccentric loading","volume":"14","author":"Ghena, D.R.; Kurth, A.L.; Thomas, M.","year":"1991","unstructured":"Ghena DR, Kurth AL, Thomas M, et al. Torque characteristics of the quadriceps and hamstring muscles during concentric and eccentric loading. J Orthop Sports Phys Ther 1991;14:149\u201354.","journal-title":"J Orthop Sports Phys Ther"},{"key":"ref_12","first-page":"39","article-title":"Torque, work and power capabilities of the elbow in normal young adults: clinical implications and applications","volume":"9","author":"Charteris, J.; Goslin, B.R.","year":"1986","unstructured":"Charteris J, Goslin BR. Torque, work and power capabilities of the elbow in normal young adults: clinical implications and applications. South African Journal for Research in Sport, Physical Education and Recreation 1986;9:39\u201349.","journal-title":"South African Journal for Research in Sport, Physical Education and Recreation"},{"key":"ref_13","first-page":"159","article-title":"Muscle force-velocity and power velocity relationships under isokinetic loading","volume":"10","author":"Perrine, J.J.; Edgerton, V.R.","year":"1978","unstructured":"Perrine JJ, Edgerton VR. Muscle force-velocity and power velocity relationships under isokinetic loading. Med Sci Sport 1978;10:159\u201366.","journal-title":"Med Sci Sport"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"59","DOI":"10.2519\/jospt.1985.7.2.59","article-title":"Muscular fitness profile of female college basketball players","volume":"7","author":"Berg, K.; Blanke, D.; Miller, M.","year":"1982","unstructured":"Berg K, Blanke D, Miller M. Muscular fitness profile of female college basketball players. J Orthop Sport Phys Ther 1982;7:59\u201364.","journal-title":"J Orthop Sport Phys Ther"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"101","DOI":"10.2165\/00007256-198908020-00003","article-title":"Isokinetic dynamometry: applications and limitations","volume":"8","author":"Baltzopoulos, V.; Brodie, D.A.","year":"1989","unstructured":"Baltzopoulos V, Brodie DA. Isokinetic dynamometry: applications and limitations. Sport Med 1989;8:101\u201316.","journal-title":"Sport Med"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1080\/00913847.1983.11708658","article-title":"Hamstring\/quadricep strength ratios in collegiate middle distance and distance runners","volume":"11","author":"Morris, A.; Lussier, L.; Bell, G.","year":"1983","unstructured":"Morris A, Lussier L, Bell G, et al. Hamstring\/quadricep strength ratios in collegiate middle distance and distance runners. Physician and Sports Medicine 1983;11:71\u20137.","journal-title":"Physician and Sports Medicine"},{"key":"ref_17","article-title":"A compendium of isokinetics in clinical usage and rehabilitation techniques","author":"Davies, G.J.","year":"1992","unstructured":"Davies GJ. A compendium of isokinetics in clinical usage and rehabilitation techniques. 4th ed. Onalaska: S and S Publishers, 1992.","edition":"4th ed"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"318","DOI":"10.1111\/j.1748-1716.1976.tb10316.x","article-title":"Fatiguability and fibre composition of human skeletal muscle","volume":"98","author":"Thorstensson, A.; Karlsson, J.","year":"1976","unstructured":"Thorstensson A, Karlsson J. Fatiguability and fibre composition of human skeletal muscle. Acta Physiol Scand 1976;98:318\u201322.","journal-title":"Acta Physiol Scand"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"216","DOI":"10.1177\/036354658501300402","article-title":"Biomechanics of baseball pitching: a preliminary report","volume":"13","author":"Pappas, A.M.; Zawacki, R.M.; Sullivan, T.J.","year":"1985","unstructured":"Pappas AM, Zawacki RM, Sullivan TJ. Biomechanics of baseball pitching: a preliminary report. Am J Sports Med 1985;13:216\u201322.","journal-title":"Am J Sports Med"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"336","DOI":"10.1080\/10803548.1996.11076355","article-title":"Morphology-related isometric trunk strength of South African manual workers: implications for the prevention of occupational low-back stress","volume":"2","author":"Charteris, J.; Scott, P.A.","year":"1996","unstructured":"Charteris J, Scott PA. Morphology-related isometric trunk strength of South African manual workers: implications for the prevention of occupational low-back stress. International Journal of Occupational and Safety Ergonomics 1996;2:336\u201346.","journal-title":"International Journal of Occupational and Safety Ergonomics"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"861","DOI":"10.2466\/pms.1988.67.3.861","article-title":"Graphing correlation coeYcients: II. An alternative procedure","volume":"67","author":"Silverstein, A.B.","year":"1988","unstructured":"Silverstein AB. Graphing correlation coeYcients: II. An alternative procedure. Percept Mot Skills 1988;67:861\u20132.","journal-title":"Percept Mot Skills"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1016\/0268-0033(89)90046-6","article-title":"Isokinetic muscle strength parameters for shoulder movements","volume":"4","author":"Reid, D.C.; Oedekoven, G.; Kramer, J.F.","year":"1989","unstructured":"Reid DC, Oedekoven G, Kramer JF, et al. Isokinetic muscle strength parameters for shoulder movements. Clinical Biomechanics 1989;4:97\u2013104.","journal-title":"Clinical Biomechanics"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1274","DOI":"10.1093\/ptj\/63.8.1274","article-title":"Using isokinetic dynamometry to test ambulatory patients with multiple sclerosis","volume":"3","author":"Armstrong, E.L.; Winant, M.D.; Swasey, R.P.","year":"1983","unstructured":"Armstrong EL, Winant MD, Swasey RP, et al. Using isokinetic dynamometry to test ambulatory patients with multiple sclerosis. Phys Ther 1983;3:1274\u20139.","journal-title":"Phys Ther"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1437","DOI":"10.1152\/jappl.1981.51.6.1437","article-title":"Specificity of power improvements through slow and fast isokinetic training","volume":"51","author":"Coyle, E.; Feiring, D.; Rotkins, T.","year":"1981","unstructured":"Coyle E, Feiring D, Rotkins T, et al. Specificity of power improvements through slow and fast isokinetic training. J Appl Physiol 1981;51:1437\u201342.","journal-title":"J Appl Physiol"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"50","DOI":"10.1055\/s-2008-1025735","article-title":"Isokinetic torque levels for knee extensors and knee flexors in soccer players","volume":"7","author":"\u00d6berg, B.; Moller, M.; Gillquist, J.","year":"1986","unstructured":"\u00d6berg B, Moller M, Gillquist J, et al. Isokinetic torque levels for knee extensors and knee flexors in soccer players. Int J Sports Med 1986;7:50\u20133.","journal-title":"Int J Sports Med"},{"key":"ref_26","first-page":"199","article-title":"Peak torque of quadriceps and hamstring muscles in basketball and soccer players of diVerent divisions","volume":"35","author":"Zakas, A.; Mandroukas, K.; Vamvakoudis, E.","year":"1995","unstructured":"Zakas A, Mandroukas K, Vamvakoudis E, et al. Peak torque of quadriceps and hamstring muscles in basketball and soccer players of diVerent divisions. J Sports Med Phys Fitness 1995;35:199\u2013205.","journal-title":"J Sports Med Phys Fitness"}],"container-title":["British Journal of Sports Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bjsm.33.4.250","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,1]],"date-time":"2025-08-01T19:54:17Z","timestamp":1754078057000},"score":1,"resource":{"primary":{"URL":"https:\/\/bjsm.bmj.com\/lookup\/doi\/10.1136\/bjsm.33.4.250"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1999,8]]},"references-count":26,"journal-issue":{"issue":"4","published-online":{"date-parts":[[1999,8,1]]},"published-print":{"date-parts":[[1999,8]]}},"alternative-id":["10.1136\/bjsm.33.4.250"],"URL":"https:\/\/doi.org\/10.1136\/bjsm.33.4.250","relation":{},"ISSN":["0306-3674","1473-0480"],"issn-type":[{"type":"print","value":"0306-3674"},{"type":"electronic","value":"1473-0480"}],"subject":[],"published":{"date-parts":[[1999,8]]}}}