Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 551897
Title In vivo assessment of muscle mitochondrial function in healthy, young males in relation to parameters of aerobic fitness
Author(s) Lagerwaard, Bart; Keijer, Jaap; McCully, Kevin K.; Boer, Vincent C.J. de; Nieuwenhuizen, Arie G.
Source European Journal of Applied Physiology 119 (2019)8. - ISSN 1439-6319 - p. 1799 - 1808.
Department(s) Human and Animal Physiology
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) EPOC - Mitochondrial capacity - Muscle mitochondria - NIRS - Oxidative metabolism

Purpose: The recovery of muscle oxygen consumption (mV˙ O2) after exercise provides a measure of skeletal muscle mitochondrial capacity, as more and better-functioning mitochondria will be able to restore mV˙ O2 faster to the pre-exercise state. The aim was to measure muscle mitochondrial capacity using near-infrared spectroscopy (NIRS) within a healthy, normally active population and relate this to parameters of aerobic fitness, investigating the applicability and relevance of using NIRS to assess muscle mitochondrial capacity non-invasively. Methods: Mitochondrial capacity was analysed in the gastrocnemius and flexor digitorum superficialis (FDS) muscles of eight relatively high-aerobic fitness (V˙ O2peak ≥ 57 mL/kg/min) and eight relatively low-aerobic fitness male subjects (V˙ O2peak ≤ 47 mL/kg/min). Recovery of whole body V˙ O2, i.e. excess post-exercise oxygen consumption (EPOC) was analysed after a cycling protocol. Results: Mitochondrial capacity, as analysed using NIRS, was significantly higher in high-fitness individuals compared to low-fitness individuals in the gastrocnemius, but not in the FDS (p = 0.0036 and p = 0.20, respectively). Mitochondrial capacity in the gastrocnemius was significantly correlated with V˙ O2peak (R2 = 0.57, p = 0.0019). Whole body V˙ O2 recovery was significantly faster in the high-fitness individuals (p = 0.0048), and correlated significantly with mitochondrial capacity in the gastrocnemius (R2 = 0.34, p = 0.028). Conclusion: NIRS measurements can be used to assess differences in mitochondrial muscle oxygen consumption within a relatively normal, healthy population. Furthermore, mitochondrial capacity correlated with parameters of aerobic fitness (V˙ O2peak and EPOC), emphasising the physiological relevance of the NIRS measurements.

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