Stance stability in shooters

Fong-chin Su, W. L. Wu, W. D. Lee

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


In many sports events, the role of balance is obvious. In shooting even small changes in posture may lead to significant changes in performance. Balance is the result of interactions between many physiological and functional systems, including cerebellum, vestibular organs, visual system, and proprioceptive system. In this study, the stance stability was quantified by three forceplate measures: the maximum sway velocity, the mean sway velocity and the dispersion index. Posture control during standing on a force plate over a period of 15 seconds was studied for talented shooters trained for the Olympic games and controls. Furthermore, the accuracy of each parameter was detected and all factors for the stability of shooters and non-shooters were weighted. Subjects were tested under four sensory conditions: comfortable stance with eyes open, comfortable stance with eyes closed, narrow stance with eyes open, and narrow stance with eyes closed. It was concluded that the shooters had better stability than untrained control subjects. The maximal velocity and the mean velocity were both valid measures of stance stability during all sensory conditions. However, the dispersion index was poor in distinguishing the differences of stance stability between shooters and controls. The results also indicated that the shooters relied less on visual control and more on proprioceptive and vestibular control than the control subjects did, but the foot position also played an important role on stability control for both the shooters and control subjects.

Original languageEnglish
Pages (from-to)187-192
Number of pages6
JournalChinese Journal of Medical and Biological Engineering
Issue number4
Publication statusPublished - 2000 Dec 1

All Science Journal Classification (ASJC) codes

  • Biophysics

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