Evaluation of the level of physical activity through musculo-articular stiffness in young adults
ISSN: 0214-9877
Any de publicació: 2017
Títol de l'exemplar: La psicología hoy: retos, logros y perspectivas de futuro. Psicología de la Adolescencia
Volum: 1
Número: 2
Pàgines: 447-458
Tipus: Article
Altres publicacions en: International Journal of Developmental and Educational Psychology: INFAD. Revista de Psicología
Resum
The purpose of the study is to evaluate the level of physical activity of young adults by means of the Musculo-articular stiffness and to analyse its correlation with the physical performance measured in jump capacity. The proposed protocol includes a Muscle-articular test of both legs, a test of maximum voluntary contraction in isometric conditions (MVCi), a countermovement jump test (CMJ), and a drop jump (DJ) protocol from different heights (20, 40 and 60 cm). 21 healthy young adult subjects (12 males and 9 females). The mechanical variables are: force (f), Muscle-articular stiffness (k) and Muscle-articular Unitary stiffness (ku). Physical variables: Jump flight height (h) and force generated (f). An Anova of repeated measurements was performed to analyse the influence of gender and laterality and a Pearson correlation to analyse the relationship between mechanical and physical parameters. The results obtained show a clear symmetry in physical and mechanical parameters. There were significant differences between men and women (f and k) (p<0.05) being in absolute terms higher in men than in women but not in relative terms (ku). A clear correlation was obtained between mechanical parameters and MVCi in absolute terms (p<0.05). Ku allows comparisons between different subjects but its interpretation is not as intuitive as in absolute terms due to the application of the Hill’s model on the mechanical response of muscle-tendon complexes that establishes a nonlinear relationship between f and k.
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