Comparison of Quadriceps and Hamstring Torque Values during Isokinetic Exercise

Wyatt, Marilynn; Edwards, A. S.

doi:10.2519/jospt.1981.3.2.48

Cited by 173 publications

(50 citation statements)

References 9 publications

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“…Is his recovery incomplete? Normal side-to-side differences have been previously examined in various adult populations, but not in children (6,11,12,17). In these studies of adults, the P T Q values were usually greater than those in our pediatric population.…”

Section: Discussionmentioning

confidence: 69%

Knee Flexor-Extensor Strength in Children

Henderson¹,

Howes²,

Erickson³

et al. 1993

J Orthop Sports Phys Ther

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sokinetic devices such as the Cybex (Lumex Corporation, Ronkonkoma, NY) and KinCom (Chattecx Corporation, Chattanooga, TN) dynamometers are widely used to measure knee flexor and extensor strength. Although most commonly used with adults, isokinetic measurements have been applied to various pediatric groups as part of research studies (1)(2)(3)5,8,14,15). These measurements can also be useful in the routine evaluation and clinical care of a pediatric patient. Questions arise, however, when attempting to interpret the results. For example, a 10-year-old boy evaluated 5 months after a right tibia fracture is found to have knee extensor strength of 43 ftIbs on the left and 39 ft-lbs on the right-a 9% difference. Is this amount of difference likely to be normal, or is his strength recovery incomplete?Isokinetic strength standards for normal children have been published (7.9.1 6). Not surprisingly, these reports indicate very large differences among children in the strength of the knee flexor and extensor. Age, height, weight, sex, % body fat, and thigh circumference are all factors that correlate with strength and can be used to account for some of the variability in strength between subjects. It is possible to obtain reasonable normal strength values for comparison to a given child using these factors and either a large series of

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Section: Discussionmentioning

confidence: 69%

Knee Flexor-Extensor Strength in Children

Henderson¹,

Howes²,

Erickson³

et al. 1993

J Orthop Sports Phys Ther

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“…The peak torque of isokinetic contraction at a test speed of 120°per second of flexor (hamstring) and extensor (quadriceps) muscles of the leg (IFX and IEX, respectively) was measured by means of an isokinetic dynamometer (Cybex; Lumex Inc., Bay Shore, NY, USA) according to standard procedure, taking into account data from the dominant leg [22,23]. The better of two testing sequences was considered for analysis.…”

Section: Skeletal Muscle Functionmentioning

confidence: 99%

“…General muscle performance was evaluated by means of the assessment of the peak torque of flexor and extensor leg muscle during isokinetic exercise [22]. Isokinetic exercise is a dynamic type of resistive exercise.…”

Section: Skeletal Muscle Functionmentioning

confidence: 99%

Time course of exercise capacity, skeletal and respiratory muscle performance after heart-lung transplantation

Ambrosino

Bruschi

Callegari

et al. 1996

European Respiratory Journal

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T Ti im me e c co ou ur rs se e oof f e ex xe er rc ci is se e c ca ap pa ac ci it ty y, , s sk ke el le et ta al l a an nd d r re es sp pi ir ra at to or ry y m mu us sc cl le e p pe er rf fo or rm ma an nc ce e a af ft te er r h he ea ar rt t--l lu un ng g t tr ra an ns sp pl la an nt ta at ti io on n N. Ambrosino*, C. Bruschi, G. Callegari, S. Baiocchi, G. Felicetti, C. Fracchia, C. RampullaTime course of exercise capacity, skeletal and respiratory muscle performance after heart-lung transplantation. N. Ambrosino, C. Bruschi, G. Callegari, S. Baiocchi, G. Felicetti, C. Fracchia, C. Rampulla. ERS Journals Ltd 1996. ABSTRACT: Recipients of heart-lung transplantation (HLT) show reduced exercise capacity due to several pre-and postsurgical factors. The aim of this study was to evaluate the time course of exercise capacity, and skeletal and respiratory muscle performance in 11 patients (5 females and 6 males; age (mean±SD) 38±13 yrs) undergoing HLT. All of the patients were admitted to our institution for a rehabilitation programme after surgery, and were followed-up for 18 months. On admission, at discharge after an in-patient rehabilitation programme, and every 6 months, patients underwent evaluation of: lung function values; incremental treadmill exercise, 6 min walking distance (6-MWD); maximal inspiratory and expiratory pressures (MIP and MEP, respectively); and peak torque of isokinetic contraction of leg flexor and extensor muscles (IFX and IEX, respectively).On admission, patients had: reduced lung volumes as assessed by vital capacity (VC) (60±15% of predicted); reduced exercise capacity as assessed by peak oxygen consumption (V ' 'O 2 ,peak) (40±12% pred); reduced skeletal and respiratory muscle performance as assessed by IEX, IFX (48±16 and 28±12 Newton-metres (N×m), respectively) and by MIP and MEP (54±21 and 58±19 cmH 2 O, respectively). Ten patients completed the rehabilitation programme. At discharge, no significant change in dynamic and static lung volumes was observed. However, nonsignificant increases in MIP, MEP, IEX, IFX, 6-MWD and V ' 'O 2 ,peak were recorded. After 6 and 12 months, indices of skeletal and respiratory muscle function and V ' 'O 2 ,peak improved further, but still remained lower than normal values.We conclude that in patients with heart-lung transplantation, skeletal and respiratory muscle function and exercise performance are reduced after surgery, that they may improve with time but are still less than normal after 18 months.

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“…Os atletas profissionais de futebol geralmente apresentam um membro inferior de preferência para realização desses movimentos 1,2 . A prática desse esporte, portanto, pode favorecer a ocorrência de assimetrias de força entre MMII, aumentando a suscetibilidade do atleta a lesões [3][4][5][6][7][8] . Intervenções que reduzam a assimetria na capacidade de produção de força podem resultar em menor incidência de lesões 6 .…”

Section: Introductionunclassified

Força muscular e índice de fadiga dos extensores e flexores do joelho de jogadores profissionais de futebol de acordo com o posicionamento em campo

Carvalhais

Santos

Araújo

et al. 2013

Rev Bras Med Esporte

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RESuMoIntrodução: Assimetrias na capacidade de produção de força entre músculos dos membros inferiores e fadiga muscular podem favorecer a ocorrência de lesões em atletas de futebol. Considerando-se que existem diferenças individuais determinadas pelas diversas funções exercidas pelos jogadores, é possível que a presença de assimetrias de força e fadiga muscular esteja relacionada ao posicionamento em campo. Objetivos: 1) Investigar diferenças na assimetria de pico de torque (PT), na assimetria de trabalho (T) e no índice de fadiga ( ABStRAct Introduction: Strength asymmetry among the muscles of the lower limbs and muscle fatigue may predispose soccer players to injuries. Regarding the individual differences determined by diverse roles performed by players, it is possible that the presence of asymmetries of muscle strength and fatigue is related to playing position. Objectives: 1) To investigate differences in asymmetry of peak torque (PT), work asymmetry (W) and fatigue index (FI) of knee extensors and flexors of professional soccer players according to their positioning in field; 2) To determine if FI of knee flexors is higher than

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Comparison of Quadriceps and Hamstring Torque Values during Isokinetic Exercise

Cited by 173 publications

References 9 publications

Knee Flexor-Extensor Strength in Children

Knee Flexor-Extensor Strength in Children

Time course of exercise capacity, skeletal and respiratory muscle performance after heart-lung transplantation

Força muscular e índice de fadiga dos extensores e flexores do joelho de jogadores profissionais de futebol de acordo com o posicionamento em campo

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