Effect of relaxation time on hysteresis of human tendon in vivo.
J Musculoskelet Neuronal Interact
; 23(1): 84-89, 2023 03 01.
Article
em En
| MEDLINE
| ID: mdl-36856103
ABSTRACT
OBJECTIVES:
The purpose of this study was to investigate the effect of relaxation time on tendon hysteresis.METHODS:
Subjects exerted isometric plantar flexion torque from rest to maximal voluntary isometric contractions within around 0.5 s, followed by relaxation with six different times (0.3, 0.5, 0.7, 1, 3, and 5 s). During each trial, tendon elongation in the medial gastrocnemius muscle was measured by ultrasonography. The area within the exerted torque-tendon elongation loop, as a percentage of the area beneath the curve during ascending phase, was calculated as tendon hysteresis.RESULTS:
Between the 0.3 and 1 s relaxation time conditions, the hysteresis values were significantly greater for the shorter relaxation time conditions (except between the 0.5 and 0.7 s conditions). In contrast, no significant differences in tendon hysteresis were found between 1 and 5 s of relaxation time conditions. Furthermore, the relationship between relaxation time and tendon hysteresis showed a significantly negative correlation under 1 s or less of relaxation time, but no significant correlation was observed under conditions of 1 s or more.CONCLUSION:
These results suggest that relaxation time greatly affects tendon hysteresis under condition that relaxation time was less than 1 s.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tendões
/
Contração Isométrica
Limite:
Humans
Idioma:
En
Revista:
J Musculoskelet Neuronal Interact
Assunto da revista:
FISIOLOGIA
/
NEUROLOGIA
/
ORTOPEDIA
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Japão