Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities
Abstract This study aimed to test the agreement of the incremental test's physiological responses between tethered running on a nonmotorized treadmill (NMT) to matched relative intensities while running on a conventional motorized treadmill (MT). Using a within-subject crossover design, nine ma...
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| Format: | Article |
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Nature Portfolio
2022-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-13741-w |
| _version_ | 1818488555277647872 |
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| author | Filipe A. B. Sousa Fúlvia B. Manchado-Gobatto Natália de A. Rodrigues Gustavo G. de Araujo Claudio A. Gobatto |
| author_facet | Filipe A. B. Sousa Fúlvia B. Manchado-Gobatto Natália de A. Rodrigues Gustavo G. de Araujo Claudio A. Gobatto |
| author_sort | Filipe A. B. Sousa |
| collection | DOAJ |
| description | Abstract This study aimed to test the agreement of the incremental test's physiological responses between tethered running on a nonmotorized treadmill (NMT) to matched relative intensities while running on a conventional motorized treadmill (MT). Using a within-subject crossover design, nine male recreational runners (age = 22 ± 5 years; height = 175 ± 6 cm; weight = 68.0 ± 16.6 kg) underwent two test sessions: one was an incremental intensity protocol on an MT; the other was on an instrumented NMT. Intensity thresholds at $${\dot{\text V}}$$ V ˙ O2max, respiratory compensation point (iRCP), and lactate threshold (iLT) were registered for analysis, together with $${\dot{\text V}}$$ V ˙ ̇O2, $${\dot{\text V}}$$ V ˙ ̇E, ƒR, and blood lactate concentration ([Lac]). Comparisons were based on hypothesis testing (Student's T-test), effect sizes (Cohen's d), ICC, and Bland Altman analysis. Statistical significance was accepted at p < 0.05. Attained $${\dot{\text V}}$$ V ˙ O2max (MT = 52.2 ± 7.3 mL·kg-1·min-1 vs NMT = 50.1 ± 8.1 mL·kg-1·min-1) and $${\dot{\text V}}$$ V ˙ ̇O2 at iRCP (MT = 46.3 ± 7.2 mL·kg-1·min-1 vs NMT = 42.8 ± 9.3 mL·kg-1·min-1) were not different between ergometers (p = 0.15 and 0.13, respectively), with significant ICCs (0.84 and 0.70, respectively) and Pearson’s correlations (r = 0.87 and 0.76, respectively). The [Lac] at iLT presented poor agreement between conditions. Significant correlations were found (r between 0.72 and 0.83) for relative power values of i $${\dot{\text V}}$$ V ˙ O2max (6.56 ± 1.28 W·kg−1), iRCP (4.38 ± 1.50 W·kg−1), and iLT (4.15 ± 1.29 W·kg−1) related to their counterpart obtained on MT. Results show that running on an NMT offers a higher glycolytic demand under the same relative internal load as running on an MT but with a similar aerobic response and correlated intensity determination. |
| first_indexed | 2024-12-10T16:52:31Z |
| format | Article |
| id | doaj.art-aa43c809e3c94c159c8eeef4525ca2f0 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-10T16:52:31Z |
| publishDate | 2022-07-01 |
| publisher | Nature Portfolio |
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| spelling | doaj.art-aa43c809e3c94c159c8eeef4525ca2f02022-12-22T01:40:50ZengNature PortfolioScientific Reports2045-23222022-07-011211910.1038/s41598-022-13741-wComparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensitiesFilipe A. B. Sousa0Fúlvia B. Manchado-Gobatto1Natália de A. Rodrigues2Gustavo G. de Araujo3Claudio A. Gobatto4School of Applied Sciences, University of CampinasSchool of Applied Sciences, University of CampinasSchool of Applied Sciences, University of CampinasLaboratory of Applied Sports Sciences, Federal University of AlagoasSchool of Applied Sciences, University of CampinasAbstract This study aimed to test the agreement of the incremental test's physiological responses between tethered running on a nonmotorized treadmill (NMT) to matched relative intensities while running on a conventional motorized treadmill (MT). Using a within-subject crossover design, nine male recreational runners (age = 22 ± 5 years; height = 175 ± 6 cm; weight = 68.0 ± 16.6 kg) underwent two test sessions: one was an incremental intensity protocol on an MT; the other was on an instrumented NMT. Intensity thresholds at $${\dot{\text V}}$$ V ˙ O2max, respiratory compensation point (iRCP), and lactate threshold (iLT) were registered for analysis, together with $${\dot{\text V}}$$ V ˙ ̇O2, $${\dot{\text V}}$$ V ˙ ̇E, ƒR, and blood lactate concentration ([Lac]). Comparisons were based on hypothesis testing (Student's T-test), effect sizes (Cohen's d), ICC, and Bland Altman analysis. Statistical significance was accepted at p < 0.05. Attained $${\dot{\text V}}$$ V ˙ O2max (MT = 52.2 ± 7.3 mL·kg-1·min-1 vs NMT = 50.1 ± 8.1 mL·kg-1·min-1) and $${\dot{\text V}}$$ V ˙ ̇O2 at iRCP (MT = 46.3 ± 7.2 mL·kg-1·min-1 vs NMT = 42.8 ± 9.3 mL·kg-1·min-1) were not different between ergometers (p = 0.15 and 0.13, respectively), with significant ICCs (0.84 and 0.70, respectively) and Pearson’s correlations (r = 0.87 and 0.76, respectively). The [Lac] at iLT presented poor agreement between conditions. Significant correlations were found (r between 0.72 and 0.83) for relative power values of i $${\dot{\text V}}$$ V ˙ O2max (6.56 ± 1.28 W·kg−1), iRCP (4.38 ± 1.50 W·kg−1), and iLT (4.15 ± 1.29 W·kg−1) related to their counterpart obtained on MT. Results show that running on an NMT offers a higher glycolytic demand under the same relative internal load as running on an MT but with a similar aerobic response and correlated intensity determination.https://doi.org/10.1038/s41598-022-13741-w |
| spellingShingle | Filipe A. B. Sousa Fúlvia B. Manchado-Gobatto Natália de A. Rodrigues Gustavo G. de Araujo Claudio A. Gobatto Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities Scientific Reports |
| title | Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities |
| title_full | Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities |
| title_fullStr | Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities |
| title_full_unstemmed | Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities |
| title_short | Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities |
| title_sort | comparison of physiological responses of running on a nonmotorized and conventional motor propelled treadmill at similar intensities |
| url | https://doi.org/10.1038/s41598-022-13741-w |
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