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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology


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The Journal of Sports Medicine and Physical Fitness 2017 Sep 22

DOI: 10.23736/S0022-4707.17.07712-X

Copyright © 2017 EDIZIONI MINERVA MEDICA

language: English

The effect of motor learning and fatigue on pre-activation of the lower extremity muscles during different jumps

Anna M. KAMELSKA 1 , Bartosz KOT 2, 3

1 Clinic of Rehabilitation, Provincial Specialist Children’s Hospital in Olsztyn, Olsztyn, Poland; 2 Department of Biomechanics, Jozef Pilsudski University of Physical Education in Warsaw, Warsaw, Poland; 3 Fizjoterapia Bartosz Kot, Warsaw, Poland


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BACKGROUND: The first step in identifying risk factors for injuries is to characterize the myoelectric activity of different muscles after ground contact, especially when fatigue is a limiting factor. This study aimed at: (a) recording the myoelectric activity of calf muscles after ground contact during different types of jumps and (b) investigating the effect of motor learning and fatigue on muscle pre-activation.
METHODS: Twenty four male students aged 24.3 ± 1.2 years old performed three different motor activities: (a) Jump from a box with counter landing (JCL) on 30x30 cm plate (b) Drop jump with bounce drop jump (BDJ) and (c) BDJ followed by a jump on 51-cm step. The surface EMG was used to examine the following muscles: m. tibialis anterior (TA), m. gastrocnemius medialis (GM), m. gastrocnemius lateralis (GL), and m. soleus (S). The measurements were taken during different jumps before and after motor learning and fatigue stimulus.
RESULTS: There were significant differences in pre-activation for TA between JCL and BDJ followed by a jump under the influence of fatigue (p<0.05). The differences were observed also during BDJ between non-fatigued and fatigued conditions. There was a statistically significant difference for GL between BDJ pre- and post-movement motor learning and BDJ pre- and post-fatigue influence.
CONCLUSIONS: Current results indicate that myoelectric activity of muscles during motor activities is different, and the effect of motor learning and fatigue was shown. Thus, it could be important in the injury prevention in sport.


KEY WORDS: Electromyography - Lower limb - Muscle activation - Joint stiffness - Jump effort

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Publication History

Article first published online: September 22, 2017
Manuscript accepted: September 13, 2017
Manuscript revised: August 28, 2017
Manuscript received: April 19, 2017

Cite this article as

Kamelska AM, Kot B. The effect of motor learning and fatigue on pre-activation of the lower extremity muscles during different jumps. J Sports Med Phys Fitness 2017 Sep 22. DOI: 10.23736/S0022-4707.17.07712-X

Corresponding author e-mail

kamelskamedical@gmail.com;