A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Muscle‐tendon morphology and function following long‐term exposure to repeated and strenuous mechanical loading (2020)

Bissas, A., Havenetidis, K., Walker, J., Hanley, B., Nicholson, G., Metaxas, T., Christoulas, K., & Cronin, N. J. (2020). Muscle‐tendon morphology and function following long‐term exposure to repeated and strenuous mechanical loading. Scandinavian Journal of Medicine and Science in Sports, 30(7), 1151-1162. https://doi.org/10.1111/sms.13669

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Bissas, Athanassios; Havenetidis, Konstantinos; Walker, Josh; Hanley, Brian; Nicholson, Gareth; Metaxas, Thomas; Christoulas, Kosmas; Cronin, Neil J.

Lehti tai sarja: Scandinavian Journal of Medicine and Science in Sports

ISSN: 0905-7188

eISSN: 1600-0838

Julkaisuvuosi: 2020

Volyymi: 30

Lehden numero: 7

Artikkelin sivunumerot: 1151-1162

Kustantaja: Wiley-Blackwell

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1111/sms.13669

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/68462

Tiivistelmä

We mapped structural and functional characteristics of muscle‐tendon units in a population exposed to very long‐term routine overloading. Twenty‐eight military academy cadets (age: 21.00 ± 1.1 yrs; height: 176.1 ± 4.8 cm; mass: 73.8 ± 7.0 kg) exposed for over 24 months to repetitive overloading were profiled via ultrasonography with a senior subgroup of them (n = 11; age = 21.4 ± 1.0 yrs; height = 176.5 ± 4.8 cm; mass = 71.4 ± 6.6 kg) also tested while walking and marching on a treadmill. A group of eleven ethnicity‐ and aged‐matched civilians (age = 21.6 ± 0.7 yrs; height = 176.8 ± 4.3 cm; mass = 74.6 ± 5.6 kg) was also profiled and tested. Cadets and civilians exhibited similar morphology (muscle and tendon thickness and cross‐sectional area, pennation angle, fascicle length) in 26 out of 29 sites including the Achilles tendon. However, patellar tendon thickness along the entire tendon was greater (p<0.05) by a mean of 16% for the senior cadets compared with civilians. Dynamically, cadets showed significantly smaller ranges of fascicle length change and lower shortening velocity in medial gastrocnemius during walking (44.0% and 47.6%, p<0.05 ‐ 0.01) and marching (27.5% and 34.3%, p<0.05 ‐ 0.01) than civilians. Furthermore, cadets showed lower normalised soleus electrical activity during walking (22.7%, p<0.05) and marching (27.0%, p<0.05). Therefore, 24‐36 months of continuous overloading, primarily occurring under aerobic conditions, leads to more efficient neural and mechanical behaviour in the triceps surae complex, without any major macroscopic alterations in key anatomical structures.

YSO-asiasanat: biomekaniikka; lihakset; faskiat; jänteet; rasitus; ylikuormitus; hermo-lihastoiminta

Vapaat asiasanat: fascicle mechanics; marching; medial gastrocnemius; overloading; patellar tendon; triceps surae; ultrasound

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2020

JUFO-taso: 2