The short-term effects of low-load isometric resistance training by the addition of neuromuscular electrical stimulation on the rate of force development in hip abductor muscles

Article type: Research Article

Authors: Takeda, Kazuya^a | Tanabe, Shigeo^{b; *} | Koyama, Soichiro^b | Shomoto, Koji^c | Nagai, Tomoko^a | Naoi, Yuki^a | Ushiroyama, Kosuke^a | Saito, Yumi^a | Sakurai, Hiroaki^b | Kanada, Yoshikiyo^b

Affiliations: [a] Department of Rehabilitation, Kawamura Hospital, Gifu, Japan | [b] Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Aichi, Japan | [c] Department of Physical Therapy, Faculty of Health Science, Kio University, Kitakatsuragigun Koryocho, Nara, Japan

Correspondence: [*] Corresponding author: Shigeo Tanabe, RPT, PhD, 98-1 Dengakugakubo, Kutsukake, Toyoake, Aichi, 470-1192, Japan. Tel.: +81 562 93 9000; Fax: +81 562 95 6817; E-mail: [email protected].

Abstract: INTRODUCTION:The rate of force development (RFD) is increased by high-load isometric resistance training (RT), whereas not by low-load isometric RT. However, it is unknown whether low-load isometric RT with neuromuscular electrical stimulation (NMES) can increase the RFD. PURPOSE:The aim of this study was to clarify the short-term effects of low-load isometric RT with NMES on the RFD. METHOD:Twenty-four healthy subjects randomly received both low-load RT of the hip abductor muscles with NMES and sham NMES condition. The RFD of the homonymous muscles was assessed at pre- and post-intervention. Time intervals of the RFD were set to 0–50 ms (50RFD), 0–100 ms (100RFD), 0–200 ms (200RFD), and 0–300 ms (300RFD). Two-way repeated measures analysis of variance was used to analyze the effects of time and intervention. RESULT:Low-load RT with NMES significantly increased 50 and 100RFD compared to sham NMES condition. On the other hand, 200 and 300RFD were not changed by either condition. CONCLUSIONS:The significantly increased RFD might be related to the factors affecting each RFD interval. This finding might have an important clinical implication for developing a mechanism-based effective training.

Keywords: Rate of force development, hip abductor muscles, neuromuscular electrical stimulation, low-load resistance training, healthy adults

DOI: 10.3233/PPR-190140

Journal: Physiotherapy Practice and Research, vol. 41, no. 1, pp. 3-9, 2020