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Excitation of the bottom-up pathways has no effect on remote muscle fatigue in healthy participants
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Excitation of the bottom-up pathways has no effect on remote muscle fatigue in healthy participants
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Journal Article
Excitation of the bottom-up pathways has no effect on remote muscle fatigue in healthy participants
2025
Overview
The aim of this study is to investigate the effect of induced excitation of the bottom-up pathways at the lateral elbow muscles on local muscle fatigue in the neck region in healthy participants. Eligible participants (n:55) were randomly allocated to an intervention group (n:28) or a control group (n:27). The fatigue of bilateral neck flexor(sternocleidomastoid) and extensor (upper trapezius) muscles was evaluated using surface electromyography, at baseline and immediately post-intervention during a neck flexor and extensor endurance test respectively. Excitation of the bottom-up pathways was performed at multiple lateral elbow muscles in the intervention group by using a temporal summation protocol of mechanical pain, and the pressure pain threshold was determined once in each of the multiple lateral elbow muscles in the control group. Linear mixed model analyses were performed for each outcome measure to evaluate changes over time and within- and between-group differences. No significant “group X time” interaction effects were detected for any of the outcome measures. Significant main effects for time was found for “amplitude over time” of the left upper trapezius (p:0.003) and right sternocleidomastoid muscle (p: 0.013), and for “amplitude changes” of the left upper trapezius muscle (p:0.021). Significant within-group changes were identified in some outcomes in the control group: increased “amplitude over time” of the right sternocleidomastoid muscle (p:0.024) and decreased “amplitude changes” of the left upper trapezius muscle (p:0.024), decreased “normalized median frequency slope over time” of the left UT (p: 0.013). There were no significant within-group changes in the intervention group. No significant between-group differences for any of the outcome measures were found. This study shows no effect of the induction of excitation of the bottom-up pathways at the lateral elbow muscles on the neck muscles’ fatigue characteristics compared to a control intervention. Clinical Trial Number: NCT05146960. Date of Registration: December 7, 2021.
