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Published on: October 10, 2020
Concentric exercise-induced fatigue of the shoulder impairs proprioception but not motor control or performance in
Stelios Hadjisavvas1, Michalis A Efstathiou1, Irene-Chrysovalanto Themistocleous1
1Department of Life Sciences, Physiotherapy Program, University of Nicosia, Cyprus.
Objectives:
To investigate the effect of concentric fatigue on proprioception, motor control and performance of the shoulder in healthy young adults.
Design:
Test-retest experimental design.
Setting:
Human performance laboratory.
Participants:
20 healthy adults.
Main Outcome Meausure(S):
Proprioception was assessed using the joint repositioning sense (JRS) and the threshold to detection of passive movement (TTDPM). Motor control was assessed using the Y-balance Upper Quarter test (YBT-UQ) and performance using the Athletic Shoulder test (ASH test). All tests were conducted before and immediately after fatigue intervention (CON/CON protocol).
Results:
Following fatigue, absolute angular error (AAE) was significantly increase by 160.27 %. Moreover, there was a significant increase (48.41 %) in TTDPM after fatigue. Furthermore there was no significant differences in motor control and performance before and after fatigue intervention.
Conclusions:
Since muscular fatigue negatively affects shoulder proprioception, it is essential to assess proprioception before and after fatigue to detect any dysfunctions that may arise as a result of fatigue. To address these dysfunctions, it is recommended to engage in proprioceptive exercises under situations of fatigue in order to enhance the sensitivity of the mechanoreceptors.
