Kinetic changes in sweat lactate following fatigue during constant workload exercise
Abstract It is useful to investigate various physiological responses induced by fatigue in athletes. Moreover, wearable noninvasive sensors, including sweat sensors, are compatible with fatigue evaluation because of their ease of use, and ability to measure repeatedly and continual data. This cross‐...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Physiological Reports |
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| Online Access: | https://doi.org/10.14814/phy2.15169 |
| _version_ | 1818333588358168576 |
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| author | Hiroki Okawara Tomonori Sawada Daisuke Nakashima Yuta Maeda Shunsuke Minoji Takashi Morisue Yoshinori Katsumata Morio Matsumoto Masaya Nakamura Takeo Nagura |
| author_facet | Hiroki Okawara Tomonori Sawada Daisuke Nakashima Yuta Maeda Shunsuke Minoji Takashi Morisue Yoshinori Katsumata Morio Matsumoto Masaya Nakamura Takeo Nagura |
| author_sort | Hiroki Okawara |
| collection | DOAJ |
| description | Abstract It is useful to investigate various physiological responses induced by fatigue in athletes. Moreover, wearable noninvasive sensors, including sweat sensors, are compatible with fatigue evaluation because of their ease of use, and ability to measure repeatedly and continual data. This cross‐sectional study aimed to clarify how sweat lactate elimination curves obtained during constant workload exercise changed following fatigue. Seventeen recreationally trained males (average age, 20.6 ± 0.8 years) completed two consecutive constant workload exercise tests (at 25% peak power) with rest intervals; the participants were encouraged to perform Test 1 until exhaustion and Test 2 only for 10 min. Subjective fatigue (numerical rating scale with face rating scale), sweat lactate, and sweat rate were measured for 10 min in each test. Subjective fatigue was compared using the Wilcoxon signed‐rank test and time to each constant value between Tests 1 and 2 was compared using paired t‐test. Subjective fatigue significantly increased during Test 2 compared with that during Test 1. After Test 1, the sweat lactate elimination curve demonstrated a leftward shift, as proved by the significantly sooner observation of the peak and constant values of sweat lactate (2, 3, and 4 μA) (p < 0.01). Our preliminary results suggest that the sweat lactate elimination curve is different in the fatigue state. Further research may provide insight in the application of this curve to the evaluation for fatigue. |
| first_indexed | 2024-12-13T13:54:01Z |
| format | Article |
| id | doaj.art-55c38570fb484758959aec78106e7f1f |
| institution | Directory Open Access Journal |
| issn | 2051-817X |
| language | English |
| last_indexed | 2024-12-13T13:54:01Z |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Physiological Reports |
| spelling | doaj.art-55c38570fb484758959aec78106e7f1f2022-12-21T23:42:58ZengWileyPhysiological Reports2051-817X2022-01-01102n/an/a10.14814/phy2.15169Kinetic changes in sweat lactate following fatigue during constant workload exerciseHiroki Okawara0Tomonori Sawada1Daisuke Nakashima2Yuta Maeda3Shunsuke Minoji4Takashi Morisue5Yoshinori Katsumata6Morio Matsumoto7Masaya Nakamura8Takeo Nagura9Department of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanInstitute for Integrated Sports Medicine Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanDepartment of Orthopaedic Surgery Keio University School of Medicine Shinjuku JapanAbstract It is useful to investigate various physiological responses induced by fatigue in athletes. Moreover, wearable noninvasive sensors, including sweat sensors, are compatible with fatigue evaluation because of their ease of use, and ability to measure repeatedly and continual data. This cross‐sectional study aimed to clarify how sweat lactate elimination curves obtained during constant workload exercise changed following fatigue. Seventeen recreationally trained males (average age, 20.6 ± 0.8 years) completed two consecutive constant workload exercise tests (at 25% peak power) with rest intervals; the participants were encouraged to perform Test 1 until exhaustion and Test 2 only for 10 min. Subjective fatigue (numerical rating scale with face rating scale), sweat lactate, and sweat rate were measured for 10 min in each test. Subjective fatigue was compared using the Wilcoxon signed‐rank test and time to each constant value between Tests 1 and 2 was compared using paired t‐test. Subjective fatigue significantly increased during Test 2 compared with that during Test 1. After Test 1, the sweat lactate elimination curve demonstrated a leftward shift, as proved by the significantly sooner observation of the peak and constant values of sweat lactate (2, 3, and 4 μA) (p < 0.01). Our preliminary results suggest that the sweat lactate elimination curve is different in the fatigue state. Further research may provide insight in the application of this curve to the evaluation for fatigue.https://doi.org/10.14814/phy2.15169fatiguelactic acidphysiologysportssweating |
| spellingShingle | Hiroki Okawara Tomonori Sawada Daisuke Nakashima Yuta Maeda Shunsuke Minoji Takashi Morisue Yoshinori Katsumata Morio Matsumoto Masaya Nakamura Takeo Nagura Kinetic changes in sweat lactate following fatigue during constant workload exercise Physiological Reports fatigue lactic acid physiology sports sweating |
| title | Kinetic changes in sweat lactate following fatigue during constant workload exercise |
| title_full | Kinetic changes in sweat lactate following fatigue during constant workload exercise |
| title_fullStr | Kinetic changes in sweat lactate following fatigue during constant workload exercise |
| title_full_unstemmed | Kinetic changes in sweat lactate following fatigue during constant workload exercise |
| title_short | Kinetic changes in sweat lactate following fatigue during constant workload exercise |
| title_sort | kinetic changes in sweat lactate following fatigue during constant workload exercise |
| topic | fatigue lactic acid physiology sports sweating |
| url | https://doi.org/10.14814/phy2.15169 |
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