2024-03-28T19:45:18Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02002181
2023-02-07T00:52:40Z
1213:1362:1363
Relationship between respiratory muscle endurance and dyspnea during high-intensity exercise in trained distance runners
Mizuno, Sahiro
Suzuki, Yasuhiro
Goto, Kazushige
Takao, Kenji
Sumi, Daichi
Ishida, Koji
Mizuno, Fumihiro
Katayama, Keisho
Respiratory muscles
Breathing exercise
Isocapnic hyperpnea
Pulmonary function
We hypothesized that the trained distance runners, who have a relatively high respiratory muscle endurance, but not high respiratory muscle strength, have lower dyspneic sensations during submaximal running. Twenty-one male collegiate distance runners participated. Incremental respiratory endurance tests (IRET) and maximal inspiratory mouth pressure (PImax) measurements were performed under resting conditions. A submaximal exercise test was also performed on a treadmill at two different speeds (16 and 18 km/h) for 4 min each, and the subjects reported the rate of dyspnea (range: 0–10). The time to endpoint during the IRET, an index of respiratory muscle endurance, ranged from 9.4 to 18.8 min, and PImax, as an index of inspiratory muscle strength, ranged from 74.1 to 137.0 cmH2O. The dyspnea rating during running at 16 and 18 km/h ranged from 1 to 6 and from 4 to 8, respectively. The relative exercise intensity was approximately 80 % of peak oxygen uptake (VO2peak) at 16 km/h and 90 %VO2peak at 18 km/h. The time to endpoint during the IRET was significantly negatively correlated with dyspnea during running at 18 km/h (r = -0.459, P = 0.040), but not at 16 km/h (r = -0.161, P = 0.470). There was no significant correlation between PImax and dyspnea during running at 16 km/h (r = -0.003, P = 0.989) or 18 km/h (r = 0.070, P = 0.755). These results suggest that dyspneic sensations during high-intensity running are related to respiratory muscle endurance, but not inspiratory muscle strength, in trained distance runners.
journal article
Elsevier
2022-02
application/pdf
Respiratory Physiology & Neurobiology
296
103812
15699048
https://nagoya.repo.nii.ac.jp/record/2002181/files/Manuscsript_R1.pdf
eng
https://doi.org/10.1016/j.resp.2021.103812
© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/