TITLE:
Laterality and Accuracy of Force Exertion in Elbow Flexion
AUTHORS:
Hiroki Aoki, Shinichi Demura
KEYWORDS:
Isometric Strength, Laterality, Accuracy
JOURNAL NAME:
Advances in Physical Education,
Vol.7 No.1,
February
28,
2017
ABSTRACT: In elbow flexion, accuracy of force exertion on demand values might differ between dominant and non-dominant hands. This study examined laterality and accuracy of force exertion in elbow flexion. The participants were 22 right-handed, healthy young males (mean age 22.6 ± 4.3 yrs, mean height 172.7 ± 7.0 cm, mean mass 75.0 ± 12.3 kg). Demand values of 25%, 50%, and 75% of maximum voluntary contraction (MVC) were selected. Using subjective judgment, the participants exerted the elbow flexion strength of each arm on each demand value. Evaluation parameters were differences (errors) between demand and exertion values and their total error. The results of a two-way ANOVA (dominant and non-dominant arms × demand value) showed significant interaction. In multiple comparison tests, errors were greater in 25% MVC than in 50% and 75% MVC for both arms. However, no significant difference was found between arms. In conclusion, in both dominant and non-dominant arms, accuracy of force exertion in elbow flexion does not show laterality and is higher in greater demand values (over 50% MVC) than in lesser values (25% MVC).