Measurement of the muscle power of the toes in female marathon runners using a toe dynamometer

Masuo Senda, Yasuhiro Takahara, Yukihisa Yagata, Kazushi Yamamoto, Hiroaki Nagashima, Hisashi Tukiyama, Hajime Inoue

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

The aim of this study was to investigate the relationship between the strength of the foot muscles that control the toes and disorders such as shin splint. In order to this, we designed and built a toe dynamometer to compare the muscle power exerted through the toes in top female marathon runners and age-matched women not involved in sports. The subjects were 12 top-level female marathon runners (Group A) and 37 student nurses who were not involved in sports (Group B). We devised a dynamometer to measure the total power exerted by the flexor muscles of the 5 toes of a single foot (total flexor power) and the combined power of the abductors of the big (1 st) and little (5th) toes (abductor power). In Group A, the total flexor power was 14.3 ± 5.3kg in the right foot and 15.4 ± 4.7 kg in the left foot. The abductor power was 1.9 ± 1.8kg in the right foot and 2.2 ± 1.9kg in the left foot. In Group B, total flexor power was 18.3 ± 6.7kg in the right foot, while the abductor power was 1.9 ± 1.7kg. The subjects from Group A with an arch index < 1.0 (n = 8) or > 1.0 (n = 4) were respectively classified as Group I and Group II. In Group I, total flexor power was 14.9 ± 5.3kg (right) and 15.5 ± 5.2kg (left), while the abductor power was 2.6 ± 1.9kg (right), and 3.1 ± 1.7kg (left). In Group II, the total flexor power was 13.2 ± 5.8kg (right) and 15.1 ± 4.2kg (left), while the abductor power was 0.7 ± 0.6kg (right) and O.3 ± O.2kg (left). The abductor power of toes was significantly lower in Group II than in Group I. The incidence of posteromedial shin pain was higher in Group II (75.0%) than in Group I (12.5%).

Original languageEnglish
Pages (from-to)189-191
Number of pages3
JournalActa medica Okayama
Volume53
Issue number4
Publication statusPublished - Dec 1 1999

Keywords

  • Female marathon runner
  • Toe dynamometer
  • Toe muscle power

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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