Morphological Characteristics of Trunk Muscle Groups in Japanese Female Elite Judo Athletes

Masaaki Hattori, Tetsuo Imaizumi, Naoki Suzuki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Using three-dimensional (3D) imaging, we investigated the morphological characteristics of the M. latissiums dorsi (LD) and M. erector spinae (ES) of the dorsal trunk in judo athletes employing a computer graphics system on magnetic resonance imaging (MRI;. The subjects were five healthy untrained women (HUW) without lower back pain syndrome, and five Japanese female elite judo athletes (EJA). There was no significant difference in height or weight between the HUW and EJA. Three-dimensional imaging of the LD and ES was reconstructed visually, based on MRI consecutive slice data taken from the first thoracic vertebra to the symphysis pubis along the trunk. Then the volume of the LD and ES was determined using a surface reconstruction algorithm. The morphological characteristics of the LD in the EJA appeared to indicate enlargment compared with those in the HUW, whereas the characteristics of the ES in both groups were similar. The volume of the LD was significantly different between the HUW (226.6α33.18 ml) and EJA (438.1α107.8 ml, whereas that of the ES showed no difference (HUW; 257.4α78.8 ml, EJA; 284.0α74.82 ml. In the EJA, but not in the HUW, there was a significant positive correlation between the volume of the LD and weight, and differences were noted between the two regression slopes. There was also a positive correlation between the volume of the ES and weight in both the HUW and EJA, which showed the same simple linear regression slope. These results suggest that the muscle hypertrophy evident in the LD, but not in the ES, is related to the effects of Judo training.

Original languageEnglish
Pages (from-to)485-493
Number of pages9
Journaljapanese journal of physical fitness and sports medicine
Volume42
Issue number5
DOIs
Publication statusPublished - 1993
Externally publishedYes

Keywords

  • 3D imaging
  • Judo athletes
  • Muscle volume
  • Trunk muscle groups

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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