The mechanistic bases of the power-time relationship: Muscle metabolic responses and relationships to muscle fibre type

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The mechanistic bases of the power-time relationship : Muscle metabolic responses and relationships to muscle fibre type. / Vanhatalo, Anni; Black, Matthew I; DiMenna, Fred J; Blackwell, Jamie R; Schmidt, Jakob Friis; Thompson, Chris; Wylie, Lee J; Mohr, Magni; Bangsbo, Jens; Krustrup, Peter; Jones, Andrew M.

I: The Journal of Physiology, Bind 594, Nr. 15, 2016, s. 4407-4423.

Publikation: Bidrag til tidsskriftTidsskriftartikelfagfællebedømt

Harvard

Vanhatalo, A, Black, MI, DiMenna, FJ, Blackwell, JR, Schmidt, JF, Thompson, C, Wylie, LJ, Mohr, M, Bangsbo, J, Krustrup, P & Jones, AM 2016, 'The mechanistic bases of the power-time relationship: Muscle metabolic responses and relationships to muscle fibre type', The Journal of Physiology, bind 594, nr. 15, s. 4407-4423. https://doi.org/10.1113/JP271879

APA

Vanhatalo, A., Black, M. I., DiMenna, F. J., Blackwell, J. R., Schmidt, J. F., Thompson, C., Wylie, L. J., Mohr, M., Bangsbo, J., Krustrup, P., & Jones, A. M. (2016). The mechanistic bases of the power-time relationship: Muscle metabolic responses and relationships to muscle fibre type. The Journal of Physiology, 594(15), 4407-4423. https://doi.org/10.1113/JP271879

Vancouver

Vanhatalo A, Black MI, DiMenna FJ, Blackwell JR, Schmidt JF, Thompson C o.a. The mechanistic bases of the power-time relationship: Muscle metabolic responses and relationships to muscle fibre type. The Journal of Physiology. 2016;594(15):4407-4423. https://doi.org/10.1113/JP271879

Author

Vanhatalo, Anni ; Black, Matthew I ; DiMenna, Fred J ; Blackwell, Jamie R ; Schmidt, Jakob Friis ; Thompson, Chris ; Wylie, Lee J ; Mohr, Magni ; Bangsbo, Jens ; Krustrup, Peter ; Jones, Andrew M. / The mechanistic bases of the power-time relationship : Muscle metabolic responses and relationships to muscle fibre type. I: The Journal of Physiology. 2016 ; Bind 594, Nr. 15. s. 4407-4423.

Bibtex

@article{d00a8b2c2f824bd69b0c94952dc3baaf,
title = "The mechanistic bases of the power-time relationship: Muscle metabolic responses and relationships to muscle fibre type",
abstract = "We hypothesised that: 1) the critical power (CP) will represent a boundary separating steady state from non-steady state muscle metabolic responses during whole-body exercise and 2) that the CP and the W' (curvature constant of the power-time relationship for high-intensity exercise) will be correlated with type I and type IIx muscle fibre distributions, respectively. Four men and four women performed a 3-min all-out cycling test for the estimation of CP and constant work rate (CWR) tests slightly >CP until exhaustion (Tlim ), slightly <CP for 24 min and until the >CP Tlim isotime to test hypothesis 1. Eleven men performed 3-min all-out tests and donated muscle biopsies to test hypothesis 2. Below CP, muscle [PCr] (42.6 ± 7.1 vs 49.4 ± 6.9 mmol/kgDW), [La(-) ] (34.8 ± 12.6 vs 35.5 ± 13.2 mmol/kgDW) and pH (7.11 ± 0.08 vs 7.10 ± 0.11) remained stable between ∼12 and 24 min (P>0.05 for all), whereas these variables changed with time >CP such that they were greater ([La(-) ] 95.6 ± 14.1 mmol/kgDW) and lower ([PCr] 24.2 ± 3.9 mmol/kgDW; pH 6.84 ± 0.06) (P<0.05) at Tlim (740 ± 186 s) than during the <CP trial. The CP (234 ± 53 W) was correlated with muscle type I (r = 0.67, P = 0.025) and inversely correlated with muscle type IIx fibre proportion (r = -0.76, P = 0.01). There was no relationship between W' (19.4 ± 6.3 kJ) and muscle fibre type. These data indicate a mechanistic link between the bioenergetic characteristics of different muscle fibre types and the power-duration relationship. The CP reflects the bioenergetic characteristics of highly oxidative type I muscle fibres, such that a muscle metabolic steady-state is attainable below, but not above CP. This article is protected by copyright. All rights reserved.",
author = "Anni Vanhatalo and Black, {Matthew I} and DiMenna, {Fred J} and Blackwell, {Jamie R} and Schmidt, {Jakob Friis} and Chris Thompson and Wylie, {Lee J} and Magni Mohr and Jens Bangsbo and Peter Krustrup and Jones, {Andrew M}",
note = "CURIS 2016 NEXS 131",
year = "2016",
doi = "10.1113/JP271879",
language = "English",
volume = "594",
pages = "4407--4423",
journal = "The Journal of Physiology",
issn = "0022-3751",
publisher = "Wiley-Blackwell",
number = "15",

}

RIS

TY - JOUR

T1 - The mechanistic bases of the power-time relationship

T2 - Muscle metabolic responses and relationships to muscle fibre type

AU - Vanhatalo, Anni

AU - Black, Matthew I

AU - DiMenna, Fred J

AU - Blackwell, Jamie R

AU - Schmidt, Jakob Friis

AU - Thompson, Chris

AU - Wylie, Lee J

AU - Mohr, Magni

AU - Bangsbo, Jens

AU - Krustrup, Peter

AU - Jones, Andrew M

N1 - CURIS 2016 NEXS 131

PY - 2016

Y1 - 2016

N2 - We hypothesised that: 1) the critical power (CP) will represent a boundary separating steady state from non-steady state muscle metabolic responses during whole-body exercise and 2) that the CP and the W' (curvature constant of the power-time relationship for high-intensity exercise) will be correlated with type I and type IIx muscle fibre distributions, respectively. Four men and four women performed a 3-min all-out cycling test for the estimation of CP and constant work rate (CWR) tests slightly >CP until exhaustion (Tlim ), slightly <CP for 24 min and until the >CP Tlim isotime to test hypothesis 1. Eleven men performed 3-min all-out tests and donated muscle biopsies to test hypothesis 2. Below CP, muscle [PCr] (42.6 ± 7.1 vs 49.4 ± 6.9 mmol/kgDW), [La(-) ] (34.8 ± 12.6 vs 35.5 ± 13.2 mmol/kgDW) and pH (7.11 ± 0.08 vs 7.10 ± 0.11) remained stable between ∼12 and 24 min (P>0.05 for all), whereas these variables changed with time >CP such that they were greater ([La(-) ] 95.6 ± 14.1 mmol/kgDW) and lower ([PCr] 24.2 ± 3.9 mmol/kgDW; pH 6.84 ± 0.06) (P<0.05) at Tlim (740 ± 186 s) than during the <CP trial. The CP (234 ± 53 W) was correlated with muscle type I (r = 0.67, P = 0.025) and inversely correlated with muscle type IIx fibre proportion (r = -0.76, P = 0.01). There was no relationship between W' (19.4 ± 6.3 kJ) and muscle fibre type. These data indicate a mechanistic link between the bioenergetic characteristics of different muscle fibre types and the power-duration relationship. The CP reflects the bioenergetic characteristics of highly oxidative type I muscle fibres, such that a muscle metabolic steady-state is attainable below, but not above CP. This article is protected by copyright. All rights reserved.

AB - We hypothesised that: 1) the critical power (CP) will represent a boundary separating steady state from non-steady state muscle metabolic responses during whole-body exercise and 2) that the CP and the W' (curvature constant of the power-time relationship for high-intensity exercise) will be correlated with type I and type IIx muscle fibre distributions, respectively. Four men and four women performed a 3-min all-out cycling test for the estimation of CP and constant work rate (CWR) tests slightly >CP until exhaustion (Tlim ), slightly <CP for 24 min and until the >CP Tlim isotime to test hypothesis 1. Eleven men performed 3-min all-out tests and donated muscle biopsies to test hypothesis 2. Below CP, muscle [PCr] (42.6 ± 7.1 vs 49.4 ± 6.9 mmol/kgDW), [La(-) ] (34.8 ± 12.6 vs 35.5 ± 13.2 mmol/kgDW) and pH (7.11 ± 0.08 vs 7.10 ± 0.11) remained stable between ∼12 and 24 min (P>0.05 for all), whereas these variables changed with time >CP such that they were greater ([La(-) ] 95.6 ± 14.1 mmol/kgDW) and lower ([PCr] 24.2 ± 3.9 mmol/kgDW; pH 6.84 ± 0.06) (P<0.05) at Tlim (740 ± 186 s) than during the <CP trial. The CP (234 ± 53 W) was correlated with muscle type I (r = 0.67, P = 0.025) and inversely correlated with muscle type IIx fibre proportion (r = -0.76, P = 0.01). There was no relationship between W' (19.4 ± 6.3 kJ) and muscle fibre type. These data indicate a mechanistic link between the bioenergetic characteristics of different muscle fibre types and the power-duration relationship. The CP reflects the bioenergetic characteristics of highly oxidative type I muscle fibres, such that a muscle metabolic steady-state is attainable below, but not above CP. This article is protected by copyright. All rights reserved.

U2 - 10.1113/JP271879

DO - 10.1113/JP271879

M3 - Journal article

C2 - 26940850

VL - 594

SP - 4407

EP - 4423

JO - The Journal of Physiology

JF - The Journal of Physiology

SN - 0022-3751

IS - 15

ER -

ID: 178487621