No ageing‐related increase in fibre type grouping in sprint‐trained masters runners : A 10‐year follow‐up study
Mpaka Messa, G. A., Korhonen, M. T., & Degens, H. (2024). No ageing‐related increase in fibre type grouping in sprint‐trained masters runners : A 10‐year follow‐up study. Journal of Cachexia, Sarcopenia and Muscle, Early View. https://doi.org/10.1002/jcsm.13416
Julkaistu sarjassa
Journal of Cachexia, Sarcopenia and MusclePäivämäärä
2024Tekijänoikeudet
© 2024 The Authors. Journal of Cachexia, Sarcopenia and Muscle published by Wiley Periodicals LLC.
Background
Previous research suggests that an ageing-associated remodelling and loss of motor units due to motor neuron death contributes significantly to muscle weakness in old age. In histological sections, motor unit remodelling is reflected by increased fibre type grouping. While regular exercise may not attenuate the loss of motor units during ageing, it has been suggested to facilitate reinnervation resulting in larger motor units, and a higher number and larger fibre type groups in histological sections of muscles from aged individuals.
Methods
In a 10-year follow-up study, we assessed changes in the prevalence and size of fibre type groups in the vastus lateralis muscle from 34 male masters sprinters (40–85 years at start).
Results
Over the 10 years, there was an ageing-related reduction in performance in the 60-m sprint (P < 0.001) without significant changes in fibre type composition and fibre cross-sectional area. Neither the number of fibre type groups, defined as a fibre surrounded exclusively by fibres of the same type, nor the group size changed significantly in the 10-year period.
Conclusions
These histological data show that there is limited to no significant fibre type grouping over a 10-year period in masters athletes who continued sprint run training. This observation challenges the paradigm that ageing, at least in systematically trained sprinters, is associated with motor unit remodelling.
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Julkaisija
Wiley-VCH VerlagISSN Hae Julkaisufoorumista
2190-5991Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/202021003
Metadata
Näytä kaikki kuvailutiedotKokoelmat
- Liikuntatieteiden tiedekunta [2920]
Lisätietoja rahoituksesta
Juho Vainio Foundation; Opetus- ja kulttuuriministeriö; Yrjö Jahnsson Foundation; Päivikki and Sakari Sohlberg Foundation; European UnionLisenssi
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
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