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The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises

The purpose of this study was to explore the effect of time of day (TD) on two types of exercise protocols [continuous (CP) versus alternated (AP)]. Eleven physical education students (mean ± SD: age = 24.4 ± 1.2 years, aerobic peak power (APP) = 290 ± 31.9 W) underwent four sessions. These sessions...

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Autores principales: Souissi, Amine, Yousfi, Narimen, Souissi, Nizar, Haddad, Monoem, Driss, Tarak
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7775070/
https://www.ncbi.nlm.nih.gov/pubmed/33382736
http://dx.doi.org/10.1371/journal.pone.0244191
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author Souissi, Amine
Yousfi, Narimen
Souissi, Nizar
Haddad, Monoem
Driss, Tarak
author_facet Souissi, Amine
Yousfi, Narimen
Souissi, Nizar
Haddad, Monoem
Driss, Tarak
author_sort Souissi, Amine
collection PubMed
description The purpose of this study was to explore the effect of time of day (TD) on two types of exercise protocols [continuous (CP) versus alternated (AP)]. Eleven physical education students (mean ± SD: age = 24.4 ± 1.2 years, aerobic peak power (APP) = 290 ± 31.9 W) underwent four sessions. These sessions were performed at 08:00 (AM) and 18:00 (PM) and consisted of cycling exercises until voluntary exhaustion at 90% APP (CP) or 70%-105% APP (AP) with the order of testing randomly assigned. Time to exhaustion (time limit = Tlim) was measured from the start of the test to when voluntary exhaustion occurred. Heart rate (HR) was recorded at baseline (HRbaseline) and throughout the protocols to determine HR at exhaustion (HRpeak). Blood lactate ([La]) was measured at rest, immediately after exhaustion and at 2min30 post-exercise to determine [La]peak. A significantly higher means of Tlim (334 ± 57 s; 272 ± 59 s; p< 0.05), HRbaseline (72 ± 5 beats/min; 67 ± 5 beats/min; p< 0.01), HRpeak (186 ± 8 beats/min; 178 ± 9 beats/min; p< 0.01) and [La]peak (16.2 ± 2.1 mmol/l; 13.9 ± 1.9 mmol/l; p< 0.05) were observed in CP at the PM compared to the AM. In addition, a significant higher means of Tlim (380 ± 54 s; 312 ± 82 s; p< 0.05), HRbaseline (73.1 ± 5.5 beats/min; 67 ± 5.4 beats/min; p< 0.01), HRpeak (186 ± 8 beats/min; 180 ± 9 beats/min; p< 0.05) and [La]peak (17.9 ± 1.8 mmol/l; 14.7 ± 2.1 mmol/l; p< 0.01) were observed in AP at the PM compared to the AM. It is concluded that AP and CP are more appropriate in the late afternoon than in the morning for performing long-lasting exercises. The AP could be a novel strategy for increasing the engagement in physical activity.
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spelling pubmed-77750702021-01-11 The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises Souissi, Amine Yousfi, Narimen Souissi, Nizar Haddad, Monoem Driss, Tarak PLoS One Research Article The purpose of this study was to explore the effect of time of day (TD) on two types of exercise protocols [continuous (CP) versus alternated (AP)]. Eleven physical education students (mean ± SD: age = 24.4 ± 1.2 years, aerobic peak power (APP) = 290 ± 31.9 W) underwent four sessions. These sessions were performed at 08:00 (AM) and 18:00 (PM) and consisted of cycling exercises until voluntary exhaustion at 90% APP (CP) or 70%-105% APP (AP) with the order of testing randomly assigned. Time to exhaustion (time limit = Tlim) was measured from the start of the test to when voluntary exhaustion occurred. Heart rate (HR) was recorded at baseline (HRbaseline) and throughout the protocols to determine HR at exhaustion (HRpeak). Blood lactate ([La]) was measured at rest, immediately after exhaustion and at 2min30 post-exercise to determine [La]peak. A significantly higher means of Tlim (334 ± 57 s; 272 ± 59 s; p< 0.05), HRbaseline (72 ± 5 beats/min; 67 ± 5 beats/min; p< 0.01), HRpeak (186 ± 8 beats/min; 178 ± 9 beats/min; p< 0.01) and [La]peak (16.2 ± 2.1 mmol/l; 13.9 ± 1.9 mmol/l; p< 0.05) were observed in CP at the PM compared to the AM. In addition, a significant higher means of Tlim (380 ± 54 s; 312 ± 82 s; p< 0.05), HRbaseline (73.1 ± 5.5 beats/min; 67 ± 5.4 beats/min; p< 0.01), HRpeak (186 ± 8 beats/min; 180 ± 9 beats/min; p< 0.05) and [La]peak (17.9 ± 1.8 mmol/l; 14.7 ± 2.1 mmol/l; p< 0.01) were observed in AP at the PM compared to the AM. It is concluded that AP and CP are more appropriate in the late afternoon than in the morning for performing long-lasting exercises. The AP could be a novel strategy for increasing the engagement in physical activity. Public Library of Science 2020-12-31 /pmc/articles/PMC7775070/ /pubmed/33382736 http://dx.doi.org/10.1371/journal.pone.0244191 Text en © 2020 Souissi et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Souissi, Amine
Yousfi, Narimen
Souissi, Nizar
Haddad, Monoem
Driss, Tarak
The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises
title The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises
title_full The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises
title_fullStr The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises
title_full_unstemmed The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises
title_short The effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises
title_sort effect of diurnal variation on the performance of exhaustive continuous and alternated-intensity cycling exercises
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7775070/
https://www.ncbi.nlm.nih.gov/pubmed/33382736
http://dx.doi.org/10.1371/journal.pone.0244191
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