長期練習が弓射動作中における呼吸様相に与える影響

抄録

We studied Kyudo shooting performances from the viewpoint of coordination between movement and respiration. Three university male students voluntarily participated in our experiments. Each student, equipped with respiratory measuring devices, shot five arrows in a row. Respiratory responses were picked up by thermal sensor and pressure gauge attached to their nasal cavities. They were tested before and after two years of practice. We recorded their performances on videotape and then overlapped them with respiratory curves and arrow release curves. After these experiments, we recorded those analog curves on paper and analyzed the differences between each subject's pre and post two years practice.

Respiratory frequencies from starting motion to release point of one shot decreased after the two years practice in all subjects, espccially the unskillful one. As well, the amplitude of ventilation volume decreased. The skillful subjects synchronized their respiration with their shooting movements. They started inhaling and the moment they began their shooting motion. By using the pressure gauge more than thermal sensor,we found short and strong exhaling immediately after the release of arrow.