マウスガードが換気機能に及ぼす影響に関する研究

抄録

To investigate the effects of the mouthguard on ventilation, including respiratory frequency (F), tidal volume (V_T), oxygen uptake (VO₂), respiratory exchange ratio (R), maximal oxygen uptake (VO₂ max), and all-out time, an exercise tolerance test with modified Bruce's protocol was performed on 4 male subjects. Cumulative (cum.) value was also analyzed on F, V_T, VO₂, and R. Respective values with the mouthguard was compared to those without the mouthguard.
The results were as follows:
1. F, V_T, VO₂, and R did not show a certain tendency among the 4 subjects.
2. Cum. F at all-out time was decreased 2-8% among 3 subjects and increased 10% in 1 subject.
3. Cum. V_T at all-out time was decreased 11-12% among 3 subjects and increased 21% in 1 subject.
4. Cum. VO₂ at all-out time was decreased 2-11% among 3 subjects and increased 20% in 1 subject.
5. Cum. R at all-out time was decreased 3-13% among 3 subjects and increased 10% in 1 subject.
6. VO₂ max showed significant increase in 1 subject.
7. All-out time was decreased 3-4% among 3 subjects and increased 9% in 1 subject.