[Study on effects of mouth guard on ventilation].
To investigate the effects of the mouthguard on ventilation, including respiratory frequency (F), tidal volume (VT), 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, VT, VO2, and R. Respective values with the mouthguard was compared to those without the mouthguard. The results are as follows: 1. F, VT, VO2, and R did not show a certain tendency among the 4 subjects. 2. Cum.F at all-out time was decreased 2 approximately 8% among 3 subjects and increased 10% in 1 subject. 3. Cum.VT at all-out time was decreased 11 approximately 12% among 3 subjects and increased 21% in 1 subject. 4. Cum. VO2 at all-out time was decreased 2 approximately 11% among 3 subjects and increased 20% in 1 subject. 5. Cum. R at all-out time was decreased 3 approximately 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 approximately 4% among 3 subjects and increased 9% in 1 subject.
Kondo
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Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University.
D000328:Adult; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D009064:Mouth Protectors; D010101:Oxygen Consumption; D011659:Pulmonary Gas Exchange; D012123:Pulmonary Ventilation; D014692:Ventilation-Perfusion Ratio