ORIGINAL PAPER
Maturation-related differences in neuromuscular fatigue after a short-term maximal run
1
Biology of Physical Activity, Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
2
Faculty of Information Technology, University of Jyväskylä, Jyväskylä, Finland
3
Research Institute for Olympic Sports, Jyväskylä, Finland
Submission date: 2017-05-31
Acceptance date: 2017-07-20
Publication date: 2018-02-26
Hum Mov. 2017;18(3):17-25
KEYWORDS
TOPICS
ABSTRACT
Purpose:
This study investigated maturation-related differences in neuromuscular fatigue after a short-term maximal run.
Methods:
Eight male children, eight adolescents, and eight adults performed a maximal ca. 50-s run (300/350/400 m, respectively). Mechanisms of neuromuscular fatigue were assessed through isometric plantar flexor tests, electrical stimulation of the posterior tibial nerve, soleus electromyography, and blood tests.
Results:
All the groups showed a decrease in the running speed (children: –12.2 ± 6.5%; adolescents: –9.8 ± 5.1%; adults: –12.2 ± 3.1%), but only adults revealed a decline in the maximal isometric plantar flexor torque (–16.1 ± 13.0%). On the other hand, the relative pre- to post-fatigue change in the maximal isometric plantar flexor torque differed only between adults and adolescents. The peak torque in the passive twitch test decreased in adolescents (–19.2 ± 12.2%) and adults (–23.7 ± 13.7%). Moreover, post-fatigue minimum blood pH (children: 7.18 ± 0.03; adolescents: 7.14 ± 0.07; adults: 6.97 ± 0.06) differed between the groups. No changes were observed in the neural drive or mechanisms at the spinal level.
Conclusions:
Despite the loss of running speed, children showed no post-exercise fatigue, whereas adolescents and adults demonstrated fatigue at peripheral sites. Central fatigue could not be established for the studied groups.
This study investigated maturation-related differences in neuromuscular fatigue after a short-term maximal run.
Methods:
Eight male children, eight adolescents, and eight adults performed a maximal ca. 50-s run (300/350/400 m, respectively). Mechanisms of neuromuscular fatigue were assessed through isometric plantar flexor tests, electrical stimulation of the posterior tibial nerve, soleus electromyography, and blood tests.
Results:
All the groups showed a decrease in the running speed (children: –12.2 ± 6.5%; adolescents: –9.8 ± 5.1%; adults: –12.2 ± 3.1%), but only adults revealed a decline in the maximal isometric plantar flexor torque (–16.1 ± 13.0%). On the other hand, the relative pre- to post-fatigue change in the maximal isometric plantar flexor torque differed only between adults and adolescents. The peak torque in the passive twitch test decreased in adolescents (–19.2 ± 12.2%) and adults (–23.7 ± 13.7%). Moreover, post-fatigue minimum blood pH (children: 7.18 ± 0.03; adolescents: 7.14 ± 0.07; adults: 6.97 ± 0.06) differed between the groups. No changes were observed in the neural drive or mechanisms at the spinal level.
Conclusions:
Despite the loss of running speed, children showed no post-exercise fatigue, whereas adolescents and adults demonstrated fatigue at peripheral sites. Central fatigue could not be established for the studied groups.
Share
RELATED ARTICLE
| eISSN: | 1899-1955 |
We process personal data collected when visiting the website. The function of obtaining information about users and their behavior is carried out by voluntarily entered information in forms and saving cookies in end devices. Data, including cookies, are used to provide services, improve the user experience and to analyze the traffic in accordance with the Privacy policy. Data are also collected and processed by Google Analytics tool (more).
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.
You can change cookies settings in your browser. Restricted use of cookies in the browser configuration may affect some functionalities of the website.
