TY - JOUR

T1 - Acute effects of resistance training at different range of motions on plantar flexion mechanical properties and force

AU - Murakami, Yuta

AU - Konrad, Andreas

AU - Kasahara, Kazuki

AU - Yoshida, Riku

AU - Warneke, Konstantin

AU - Behm, David G.

AU - Nakamura, Masatoshi

N1 - This work was supported by JSPS KAKENHI with grant number [19K19890] (Masatoshi Nakamura) and the Austrian Science Fund (FWF) project [J4484] (Andreas Konrad). Publisher Copyright: © 2024 Informa UK Limited, trading as Taylor & Francis Group.

PY - 2024

Y1 - 2024

N2 - The effects obtained from resistance training depend on the exercise range of motion (ROM) performed. We aimed to examine the acute effects of different exercise ROM resistance training on the plantar flexor muscles. Eighteen healthy untrained male adults participated in three conditions: calf raises in 1) partial condition [final (short muscle length) partial ROM], 2) full condition (full ROM), and 3) control condition. The ankle dorsiflexion (DF) ROM, passive torque at DF ROM, passive stiffness of muscle-tendon unit, and maximal voluntary isometric contraction (MVC-ISO) torque were measured before and immediately after the interventions. There were significant increases in DF ROM, passive torque at DF ROM, and a decrease in MVC-ISO, but no significant interaction in passive stiffness. Post hoc test, DF ROM demonstrated moderate magnitude increases in the full condition compared to the partial (p = 0.023, d = 0.74) and control (p = 0.003, d = 0.71) conditions. Passive torque at DF ROM also showed moderate magnitude increases in the full condition compared to the control condition (p = 0.016, d = 0.69). MVC-ISO had a moderate magnitude decrease in the full condition compared to the control condition (p = 0.018, d=−0.53). Resistance training in the full ROM acutely increases joint ROM to a greater extent than final partial ROM, most likely due to stretch tolerance.

AB - The effects obtained from resistance training depend on the exercise range of motion (ROM) performed. We aimed to examine the acute effects of different exercise ROM resistance training on the plantar flexor muscles. Eighteen healthy untrained male adults participated in three conditions: calf raises in 1) partial condition [final (short muscle length) partial ROM], 2) full condition (full ROM), and 3) control condition. The ankle dorsiflexion (DF) ROM, passive torque at DF ROM, passive stiffness of muscle-tendon unit, and maximal voluntary isometric contraction (MVC-ISO) torque were measured before and immediately after the interventions. There were significant increases in DF ROM, passive torque at DF ROM, and a decrease in MVC-ISO, but no significant interaction in passive stiffness. Post hoc test, DF ROM demonstrated moderate magnitude increases in the full condition compared to the partial (p = 0.023, d = 0.74) and control (p = 0.003, d = 0.71) conditions. Passive torque at DF ROM also showed moderate magnitude increases in the full condition compared to the control condition (p = 0.016, d = 0.69). MVC-ISO had a moderate magnitude decrease in the full condition compared to the control condition (p = 0.018, d=−0.53). Resistance training in the full ROM acutely increases joint ROM to a greater extent than final partial ROM, most likely due to stretch tolerance.

KW - Flexibility

KW - maximal voluntary isometric contraction

KW - passive stiffness

KW - passive torque

KW - stretch tolerance

KW - Physical education and sports

UR - http://www.scopus.com/inward/record.url?scp=85186401202&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/8a22fa20-8370-351b-aeac-11c3de6f3d36/

U2 - 10.1080/02640414.2024.2320522

DO - 10.1080/02640414.2024.2320522

M3 - Journal articles

C2 - 38394030

AN - SCOPUS:85186401202

VL - 42

SP - 38

EP - 45

JO - Journal of Sports Sciences

JF - Journal of Sports Sciences

SN - 0264-0414

IS - 1

ER -