20.500.12556/RUL-167816 Effects of submotor-threshold tibial nerve stimulation on plantarflexion torque in healthy adults and people with multiple sclerosis Background: Submotor-threshold electrical stimulation (subES) can enhance motoneuron excitability, presenting a potential strategy for improving exercise efficiency in people with multiple sclerosis (PwMS). Objective: This study aimed to investigate the effects of superimposed subES of the tibial nerve during voluntary isometric contraction on ankle plantarflexor torque production. Methods: A total of 48 participants, comprising both PwMS and healthy participants, performed plantarflexion at three voluntary isometric contraction (MVIC) levels: 20, 60, and 100 %. During the plantarflexion, the tibial nerve was stimulated with one-second trains of subES at frequency of 80 Hz. Results: Plantarflexor torque decreased over one-second time intervals (from before to during and from during to after a train of subES) in both groups at 60 and 100 % MVIC (p < 0.01). While subES did not affect EMG signal amplitude (p > 0.05), it did lead to a statistically significant increase in median EMG frequency (p < 0.05). No differences in the effects of subES were observed between the two groups regarding torque, median EMG frequency, or EMG amplitude of the soleus muscle (p > 0.05). Conclusions: The findings indicate that the subES of the tibial nerve, as presented in this study, has limited potential for acutely enhancing ankle plantarflexor torque in PwMS. sport exercise health physical impairment rehabilitation excitability quality of life exercise for health šport telesna dejavnost zdravje telesna okvara rehabilitacija razdražljivost kakovost življenja true false true Angleški jezik Slovenski jezik Članek v reviji 2025-03-13 11:06:20 2025-03-13 11:06:22 2025-03-14 03:56:02 0000-00-00 00:00:00 2025 0 0 7 str. art. 106381 Vol. 97 May 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 796.01:613 2211-0356 10.1016/j.msard.2025.106381 228615171 1-s2.0-S2211034825001233-main.pdf 1-s2.0-S2211034825001233-main.pdf 1 D9B5B13FA777143FF58F25A07D4303CC c09da8a5e6839a7c15af457e28690dd608b98fc06aabb63ae7d79ed00ad9a0b9 87ba69c7-fff2-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200613 https://www.sciencedirect.com/science/article/pii/S2211034825001233 0 d56f9833-fff1-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200612 Fakulteta za šport 0 0 0