Muscle Deoxygenation and Neural Drive to the Muscle during Repeated Sprint Cycling

Racinais, Sébastien; Bishop, David; Denis, Romain; Lattier, G.; Mendez-Villaneuva, Alberto; Perrey, Stéphane

doi:10.1249/01.mss.0000251775.46460.cb

Cited by 156 publications

(203 citation statements)

References 26 publications

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“…Although NIRS has recently been used to study repetitive work during running (Buchheit et al 2010;Ihsan et al 2013;Jones et al 2013;Ufland et al 2013) and cycling (Billaut and Buchheit 2013;Racinais et al 2007;Billaut 2010, 2012), this is the first study employing NIRS to determine physiological responses in the working muscles during upper-body repeated sprints. Moreover, it is the first study where the responses to repeated sprints are simultaneously measured in multiple muscles varying from highly active to supposedly inactive contributors.…”

Section: Physiological Responsesmentioning

confidence: 99%

The physiological responses to repeated upper-body sprint exercise in highly trained athletes

et al. 2015

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sprint decrement of 11.7 ± 4.1 %. Cycle rate remained unchanged, whereas work per cycle progressively decreased (P < 0.05). m. triceps brachii and m. latissimus dorsi were highly desaturated already after the first sprint (all P < 0.05), whereas the response was delayed for m. biceps brachii and m. vastus lateralis. Correspondingly, increases in VO 2 mainly occurred over the first two sprints (P < 0.05) and plateaued at approximately 75 % of VO 2peak . 1RM correlated with power during the first four sprints and with average sprint power (r = 0.71-0.80, all P < 0.05), whereas VO 2peak correlated with power in the last three sprints (r = 0.60-0.71, all P < 0.05). Conclusions The main decrement in upper-body sprint performance was evident in the first five sprints, followed by highly desaturated muscles and a plateau in pulmonary oxygen uptake already after the first 2-3 sprints. While high maximal strength seems important for producing power, aerobic capacity correlates with power in the last sprints.Keywords Cross-country · Skiers · Cycle rate · Maximum strength · Oxygen saturation · Oxygen uptake · Power output Methods Twelve male elite cross-country skiers performed eight 8-s maximal poling sprints with a 22-s recovery while sitting on a modified SkiErg poling ergometer. Force, movement velocity, cycle rate, work per cycle, oxygen saturation in working muscles and pulmonary oxygen uptake were measured continuously. A 3-min all-out ergometer poling test determined VO 2peak , and 1 repetition maximum (1RM) strength was determined in a movementspecific pull-down. Results Average sprint power was 281 ± 48 W, with the highest power on the first sprint, a progressive decline in power output over the following four sprints, and a Abbreviations ATTCommunicated by Jean-René Lacour.

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Section: Physiological Responsesmentioning

confidence: 99%

The physiological responses to repeated upper-body sprint exercise in highly trained athletes

et al. 2015

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“…Near-infrared spectroscopy (NIRS) has been used to investigate exercise-specific oxygen metabolism and hemodynamics in the laboratory for a range of sports including: cycling [1,2]; sailing [3]; and speed skating [4]; for review see [5]. However, the recent development of wearable wireless, portable NIR spectrometers has enabled the investigation of changes in local muscle metabolism and blood flow during exercise in a more realistic sporting setting.…”

Section: Introductionmentioning

confidence: 99%

NIRS Measurements with Elite Speed Skaters: Comparison Between the Ice Rink and the Laboratory

Hesford

Cardinale

Laing

et al. 2012

Advances in Experimental Medicine and Biology

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Wearable, wireless near-infrared (NIR) spectrometers were used to compare changes in on-ice short-track skating race simulations over 1500m with a three-minute cycle ergometry test at constant power output (400W). The subjects were six male elite short-track speed skaters. Both protocols elicited a rapid desaturation (∆TSI%) in the muscle during early stages (initial 20s), however asymmetry between right and left legs was seen in ΔTSI% for the skating protocol, but not for cycling. Individual differences between skaters were present in both protocols. Notably, one individual who showed a relatively small TSI% change (-10.7%, group mean = -26.1%), showed a similarly small change during the cycling protocol (-5.8%, group mean = -14.3%). We conclude that NIRS-detected leg asymmetry is due to the specific demands of short-track speed skating. However, heterogeneity between individuals is not specific to the mode of exercise. Whether this is a result of genuine differences in physiology or a reflection of differences in the optical properties of the leg remains to be determined.

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“…The lack of any difference between initial and final values for UT could be explained by the fact that less well-trained muscles have greater propensity for sub maximal activation, compared to trained muscles, resulting in a smaller number of fatigued fibres, and the ability to maintain a similar load at the end of the test (Behm, Whittle, Button, & Power, 2002;Bogdanis, 2012;Nordlund, Thorstensson, & Cresswell, 2004;Racinais et al, 2007). This behaviour could suggest that TR group, and especially the dominant limb, might be better adapted to load activities, rather than those requiring endurance when compared to the UT group.…”

Section: Discussionmentioning

confidence: 99%

Tracking upper limbs fatigue by means of electronic dynamometry

Lima

Fernandes

Bertoncello

2015

Motriz: rev. educ. fis.

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Abstract-This study aimed to identify useful electronic grip dynamometry parameters to track differences between trained (TR) and untrained (UT) participants, and between dominant (DO) and non-dominant (ND) limbs as a consequence of upper limbs muscle fatigue following 10 RM tests of the brachial biceps. This experimental study with transversal design involved 18 young adult males, of whom 9 were untrained and 9 were experienced in resistance training.Isometric grip force was evaluated (30 seconds long) previous and after 10RM tests by means of a G200 Model grip dynamometer with precision load cell (Biometrics®). Significant differences between initial and final measurements were found only for trained participants: Peak force for TR-DO (67.1 vs 55.5 kgf, p = .0277); Raw average for TR-DO (46.96 vs 42.22 kgf, p = .0464), and for TR-ND (40.34 vs 36.13 kgf, p = .0277). Electronic grip dynamometry efficiently identified upper limbs fatigue in trained participants, being raw average measurements the best parameter.Keywords: muscle strength dynamometer, muscle fatigue, hand strength, resistance training.Resumo-"Rastreamento de fadiga de membros superiores por meio da dinamometria eletrônica." Objetivou-se identificar parâmetros da dinamometria eletrônica de preensão palmar úteis para monitorar diferenças entre indivíduos treinados (TR) e não treinados (UT) e entre membros dominantes (DO) e não dominantes (ND) após indução de fadiga pelo teste de 10RM para bíceps braquial. Tratou-se de estudo experimental, transversal, envolvendo 18 homens adultos jovens, 9 não treinados e 9 experientes em treinamento resistido. Avaliou-se a força isométrica de preensão palmar (por 30 segundos) antes e após o teste de 10 RM por dinamômetro de preensão com célula de carga de precisão modelo G200 (Biometrics®). Houve diferença significativa entre valores iniciais e finais somente para treinados: Pico de força para TR-DO (67,1 vs 55,5 kgf, p = 0,0277); média bruta para TR-DO (46,96 vs 42,22 kgf, p = 0,0464) e para TR-ND (40,34 vs 36,13 kgf, p = 0,0277). A dinamometria eletrônica mostrou-se eficaz em identificar a fadiga de membros superiores nos participantes treinados, sendo a média bruta o melhor parâmetro.Palavras-chave: dinamômetro de força muscular, fadiga muscular, força da mão, treinamento de resistência.Resumen-"Seguimiento de fatiga de miembros superiores mediante dinamometría electrónica." El objetivo fue identificar los parámetros en la dinamometría electrónica de presión palmar para comprobar las diferencias en individuos entrenados (TR) y no entrenados (UT) y en miembros dominantes (DO) y no dominantes (ND) después de la fatiga inducida por la prueba de 10RM para bíceps braquial. Fue estudio experimental, transversal que incluyó 18 hombres adultos jóvenes, 9 no entrenados y 9 con experiencia en entrenamiento resistido. La fuerza isométrica de presión palmar (durante 30 segundos) después de la prueba de 10RM fue evaluada por dinamómetro de presión con célula de carga de precisión modelo G200 (Biometrics®). Fue encontrada sign...

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Muscle Deoxygenation and Neural Drive to the Muscle during Repeated Sprint Cycling

Abstract: In this experimental design, our findings suggest that the ability to repeat short-duration (6 s) sprints was associated with the occurrence of both peripheral and central fatigue.

Cited by 156 publications

References 26 publications

The physiological responses to repeated upper-body sprint exercise in highly trained athletes

The physiological responses to repeated upper-body sprint exercise in highly trained athletes

NIRS Measurements with Elite Speed Skaters: Comparison Between the Ice Rink and the Laboratory

Tracking upper limbs fatigue by means of electronic dynamometry

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