Work And Peak Torque During Eccentric Exercise Do Not Predict Changes In Markers Of Muscle Damage

Chapman, Dale W.; Newton, Michael; Zainuddin, Zanial; Sacco, Paul; Nosaka, Kazunori

doi:10.1136/bjsm.2007.037929

Cited by 38 publications

(38 citation statements)

References 29 publications

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“…It has been established that decreases in maximal voluntary isometric and isokinetic contraction torque, increases in plasma CK activity and muscle soreness, and a rightward shift in the muscle length-tension relationship are evident for an extended period of time (i.e., 1-7 days after exercise) (Philippou et al 2004;Prasartwuth et al 2006;Chen et al 2007;Hubal et al 2007;Chapman et al 2008;Kamandulis et al 2010). In the present study, for the subjects of all groups the following indirect markers of muscle damage emerged within 48 h of eccentric exercise: muscle soreness; Note: Values are means (±SD).…”

Section: Causes Of Depressed Neuromuscular Function After Eccentric Ementioning

confidence: 99%

“…It is well established that unaccustomed eccentric exercise brings on the symptoms of exercise-induced muscle damage (Warren et al 1999;Fridén and Lieber 2001;Clarkson and Hubal 2002;Byrne et al 2004). These include the prolonged impairment of muscle function (ranging from 30-60 min to 2-4 weeks after exercise) (Warren et al 1999;Byrne et al 2004;Hubal et al 2007;Black and McCully 2008;Chapman et al 2008;Skurvydas et al 2006Skurvydas et al , 2008; the disruption of the intracellular muscle structure, sarcolemma, and extracellular matrix (Fridén and Lieber 2001;Clarkson and Hubal 2002); remodeling of myofiber structure (Yu et al 2002); leakage from injured muscle fibers and delayed-onset muscle soreness, stiffness, and swelling (Clarkson and Hubal 2002); and induces a rightward shift in the optimum joint angle for voluntary isometric strength (Proske and Morgan 2001;McHugh and Tetro 2003;Philippou et al 2004;Chen et al 2007) and concentric strength (Yeung and Yeung 2008;. Muscle-damaging exercise also impairs voluntary activation of muscle (Prasartwuth et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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The effect of sports specialization on musculus quadriceps function after exercise-induced muscle damage

Skurvydas

Brazaitis

Venckūnas

et al. 2011

Appl. Physiol. Nutr. Metab.

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The primary aim of the present study was to examine the effect of eccentric exercise-induced (100 submaximal eccentric contractions at an angular velocity of 60° s⁻¹, with 20-s rest intervals) muscle damage on peripheral and central fatigue of quadriceps muscle in well-trained long-distance runners, sprint runners, volleyball players, and untrained subjects. We found that (i) indirect symptoms of exercise-induced muscle damage (prolonged decrease in maximal voluntary contraction, isokinetic concentric torque, and electrically induced (20 Hz) torque) were most evident in untrained subjects, while there were no significant differences in changes of muscle soreness and plasma creatine kinase 48 h after eccentric exercise between athletes and untrained subjects; (ii) low-frequency fatigue was greater in untrained subjects and volleyball players than in sprint runners and long-distance runners; (iii) in all subjects, electrically induced (100 Hz) torque decreased significantly by about 20%, while central activation ratio decreased significantly by about 8% in untrained subjects and sprint runners, and by about 3%-5% in long-distance runners and volleyball players. Thus, trained subjects showed greater resistance to exercise-induced muscle damage for most markers, and long-distance runners had no advantage over sprint runners or volleyball players.

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Section: Causes Of Depressed Neuromuscular Function After Eccentric Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of sports specialization on musculus quadriceps function after exercise-induced muscle damage

Skurvydas

Brazaitis

Venckūnas

et al. 2011

Appl. Physiol. Nutr. Metab.

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“…We did not control for TW, as we wanted to investigate the effect of the same number of contractions and velocity, modulating only total ROM. Although the difference in TW could have an impact on the results, it may not be large, as it was demonstrated that TW performed at the ECC did not correlate well with changes in any indirect muscle damage markers [20]. Chapman et al [20] suggest that high variability in the changes in common markers of muscle damage after eccentric exercise could be explained by the variability in TW produced in the exercise.…”

Section: Discussionmentioning

confidence: 99%

Greater eccentric exercise-induced muscle damage by large versus small range of motion with the same end-point

et al. 2016

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Several factors can affect the magnitude of eccentric exercise (ECC)-induced muscle damage, but little is known regarding the effect of the range of motion (ROM) in ECC-induced muscle damage. The purpose of this study was to investigate whether elbow flexor ECC with 120° of ROM (from 60° of elbow flexion until elbow full extension - 180° [120ROM]) induces a greater magnitude of muscle damage compared with a protocol with 60° of ROM (120-180° of elbow flexion [60ROM]). Twelve healthy young men (age: 22 ± 3.1 years; height: 1.75 ± 0.05 m; body mass: 75.6 ± 13.6 kg) performed the ECC with 120ROM and 60ROM using different arms in a random order separated by 2 weeks and were tested before and 24, 48, 72 and 96 h after ECC for maximal voluntary isometric contraction torque (MVC-ISO), ROM and muscle soreness. The 120ROM protocol showed greater changes and effect sizes (ES) for MVC-ISO (-35%, ES: 1.97), ROM (-11.5°, ES: 1.27) and muscle soreness (19 mm, ES: 1.18) compared with the 60ROM protocol (-23%, ES: 0.93; -12%, ES: 0.56; 17°, ES: 0.63; 8 mm, ES: 1.07, respectively). In conclusion, ECC of the elbow flexors with 120° of ROM promotes a greater magnitude of muscle damage compared with a protocol with 60° of ROM, even when both protocols are performed at long muscle lengths.

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“…Interessantemente, essa diferença no déficit de força após o protocolo (aproximadamente 54% maior para o grupo AR comparado ao grupo BR) não foi dependente dos níveis de contração voluntária máxima pré, do trabalho total ou torque excêntrico realizados no EE (sem diferenças entre os grupos), corroborando com sugestões prévias 16 . É preciso notar que o pico de queda da capacidade de geração de força que foi utilizado em nosso estudo para a divisão em clusters levou em consideração apenas os valores de 24h-96h após o protocolo, uma vez que a medida imediatamente após o EE pode ter grande interferência da fadiga induzida pelo protocolo e não somente efeito do dano muscular na capacidade de geração de força 17 .…”

Section: Discussionunclassified

Dor muscular e atividade de creatina quinase após ações excêntricas: uma análise de cluster

Chacon-Mikahil

Vechin

Berton

et al. 2014

Rev Bras Med Esporte

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rEsumoIntrodução: O exercício excêntrico máximo promove queda da capacidade de geração de força, aumento de dor muscular de início tardio (DMIT) e extravasamento de creatina quinase (CK) no sangue. No entanto, essas respostas ao exercício excêntrico demonstram alta variabilidade interindivíduos. Objetivos: Classificar e analisar essas respostas segundo a vulnerabilidade individual, por meio da magnitude da redução dos níveis de força após exercício excêntrico. Métodos: Dezoito sujeitos (11 homens e sete mulheres com idade entre 18 e 71 anos) saudáveis realizaram cinco séries de seis ações excêntricas máximas para flexores do cotovelo em dinamômetro isocinético (90°s -1 , amplitude de movimento de 80 a 20°). Foram analisadas contração voluntária muscular concêntrica máxima (CVM), DMIT e CK pré, pós (exceto CK), 24 h, 48 h, 72 h e 96 h após o protocolo. Os indivíduos foram classificados como "baixos" (BR) e "altos" respondedores (AR) ao pico de queda de CVM pós-exercício seguindo-se uma análise de cluster e comparação entre grupos para CVM, DMIT e CK com teste-t independente. Resultados: A comparação entre BR e AR indicou maiores valores de queda de CVM para o grupo AR (AR: -30,7 ± 3,3%; BR: -14,1 ± 2,2%, p < 0,001) e maior DMIT também para o grupo AR (AR: 33,0 ± 8,6 mm; BR: 10,2 ± 2,5 mm, p = 0,033); no entanto, os valores de pico de atividade de CK não diferiram entre os grupos (AR: 232,1 ± 54,8 UI.L , p = 0,490). Conclusão: A classificação dos indivíduos em grupos de baixos e altos respondedores foi importante para demonstrar que o grupo mais responsivo à queda de força após exercício excêntrico também evidencia maiores níveis de DMIT; contudo, para a CK essa relação não pôde ser estabelecida.Palavras-chave: exercício, força muscular, músculo esquelético, treinamento de resistência. AbstrACt

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Work And Peak Torque During Eccentric Exercise Do Not Predict Changes In Markers Of Muscle Damage

Abstract: These results suggest the large inter-subject variability in responses to eccentric exercise is not associated with work performed or torque generated during eccentric exercise.

Cited by 38 publications

References 29 publications

The effect of sports specialization on musculus quadriceps function after exercise-induced muscle damage

The effect of sports specialization on musculus quadriceps function after exercise-induced muscle damage

Greater eccentric exercise-induced muscle damage by large versus small range of motion with the same end-point

Dor muscular e atividade de creatina quinase após ações excêntricas: uma análise de cluster

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