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CROSS-SECTIONAL AREA OF PSOAS MAJOR MUSCLE IN HIGH SCHOOL ATHLETES / 体力科学
Japanese Journal of Physical Fitness and Sports Medicine ; : 217-228, 2006.
Artigo em Japonês | WPRIM | ID: wpr-362365
ABSTRACT
The aim of the study was to measure the cross-sectional area of the psoas major muscle (P-ACSA) in high school athletes and to produce a P-ACSA index independent of body size using an allometric modeling approach to examine the differences in gender and sport specialization. The subjects were 254 female (16.8±0.8 yrs) and 540 male (16.9±0.8 yrs) high-level high school athletes from 17 different sports. Fat-free mass (FFM) was measured by the Bod Pod system (LMI) and P-ACSA was determined by magnetic resonance imaging at the center of the L4-L5 transverse level. Since the power function model fit the data better than a simple linear model in the correlation between FFM and P-ACSA, and the power exponent parameter was almost equal to the theoretically anticipated 2/3 in both genders, the P-ACSA per FFM<sup>2/3</sup> as well as the absolute P-ACSA was calculated. Both of the absolute P-ACSA and P-ACSA per FFM<sup>2/3</sup> were significantly different according to gender and the sport specialization. While volleyball and badminton players and canoeists showed smaller P-ACSA, in accordance with the previous studies on senior sprinters, high school sprinters also showed predominant development of P-ACSA regardless of gender. These results suggested that regular involvement in sprinting activity could affect the size of the psoas major muscle in high school athletes.

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Tipo de estudo: Estudo de prevalência Idioma: Japonês Revista: Japanese Journal of Physical Fitness and Sports Medicine Ano de publicação: 2006 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Tipo de estudo: Estudo de prevalência Idioma: Japonês Revista: Japanese Journal of Physical Fitness and Sports Medicine Ano de publicação: 2006 Tipo de documento: Artigo