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Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study
This study assessed selected measures of cognitive function in trained cyclists who observed daylight fasting during Ramadan. Eleven cyclists volunteered to participate (age: 21.6±4.8 years, VO(2)max: 57.7±5.6 ml kg(−1)·min(−1)) and were followed for 2 months. Cognitive function (Cambridge Neuropsyc...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Institute of Sport in Warsaw
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4786586/ https://www.ncbi.nlm.nih.gov/pubmed/26985134 http://dx.doi.org/10.5604/20831862.1185888 |
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author | Chamari, K Briki, W Farooq, A Patrick, T Belfekih, T Herrera, CP |
author_facet | Chamari, K Briki, W Farooq, A Patrick, T Belfekih, T Herrera, CP |
author_sort | Chamari, K |
collection | PubMed |
description | This study assessed selected measures of cognitive function in trained cyclists who observed daylight fasting during Ramadan. Eleven cyclists volunteered to participate (age: 21.6±4.8 years, VO(2)max: 57.7±5.6 ml kg(−1)·min(−1)) and were followed for 2 months. Cognitive function (Cambridge Neuropsychological Test Automated Battery (CANTAB), Reaction Time index (RTI) and Rapid Visual Information Processing (RVP) tests) and sleep architecture (ambulatory EEG) were assessed: before Ramadan (BR), in the 1st week (RA1) and 4th week of Ramadan (RA4), and 2 weeks post-Ramadan (PR). Both cognitive tests were performed twice per day: before and after Ramadan at 8-10 a.m. and 4-6 p.m., and during Ramadan at 4-6 p.m. and 0-2 a.m., respectively. Training load (TL) by the rating of perceived exertion (RPE) method and wellness (Hooper index) were measured daily. If the TL increased over the study period, this variable was stable during Ramadan. The perceived fatigue and delayed onset muscle soreness (DOMS) increased at RA4. Sleep patterns and architecture showed clear disturbances, with significant increases in the number of awakenings and light sleep durations during Ramadan (RA1 and RA4), together with decreased durations of deep and REM sleep stages at PR. RTI (simple and multiple reaction index) reaction and movement times did not vary over the study period. The RVP test showed reduced false alarms during Ramadan, suggesting reduced impulsivity. Overall accuracy significantly increased at RA1, RA4 and PR compared to baseline. At RA4, the accuracy was higher at 0-2 a.m. compared to 4-6 p.m. Despite the observed disturbances in sleep architecture, Ramadan fasting did not negatively impact the cognitive performance of trained cyclists from the Middle East. |
format | Online Article Text |
id | pubmed-4786586 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Institute of Sport in Warsaw |
record_format | MEDLINE/PubMed |
spelling | pubmed-47865862016-03-16 Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study Chamari, K Briki, W Farooq, A Patrick, T Belfekih, T Herrera, CP Biol Sport Original Article This study assessed selected measures of cognitive function in trained cyclists who observed daylight fasting during Ramadan. Eleven cyclists volunteered to participate (age: 21.6±4.8 years, VO(2)max: 57.7±5.6 ml kg(−1)·min(−1)) and were followed for 2 months. Cognitive function (Cambridge Neuropsychological Test Automated Battery (CANTAB), Reaction Time index (RTI) and Rapid Visual Information Processing (RVP) tests) and sleep architecture (ambulatory EEG) were assessed: before Ramadan (BR), in the 1st week (RA1) and 4th week of Ramadan (RA4), and 2 weeks post-Ramadan (PR). Both cognitive tests were performed twice per day: before and after Ramadan at 8-10 a.m. and 4-6 p.m., and during Ramadan at 4-6 p.m. and 0-2 a.m., respectively. Training load (TL) by the rating of perceived exertion (RPE) method and wellness (Hooper index) were measured daily. If the TL increased over the study period, this variable was stable during Ramadan. The perceived fatigue and delayed onset muscle soreness (DOMS) increased at RA4. Sleep patterns and architecture showed clear disturbances, with significant increases in the number of awakenings and light sleep durations during Ramadan (RA1 and RA4), together with decreased durations of deep and REM sleep stages at PR. RTI (simple and multiple reaction index) reaction and movement times did not vary over the study period. The RVP test showed reduced false alarms during Ramadan, suggesting reduced impulsivity. Overall accuracy significantly increased at RA1, RA4 and PR compared to baseline. At RA4, the accuracy was higher at 0-2 a.m. compared to 4-6 p.m. Despite the observed disturbances in sleep architecture, Ramadan fasting did not negatively impact the cognitive performance of trained cyclists from the Middle East. Institute of Sport in Warsaw 2015-12-30 2016-03 /pmc/articles/PMC4786586/ /pubmed/26985134 http://dx.doi.org/10.5604/20831862.1185888 Text en Copyright © Biology of Sport 2016 http://creativecommons.org/licenses/by-nc-nd/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Chamari, K Briki, W Farooq, A Patrick, T Belfekih, T Herrera, CP Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study |
title | Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study |
title_full | Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study |
title_fullStr | Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study |
title_full_unstemmed | Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study |
title_short | Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study |
title_sort | impact of ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4786586/ https://www.ncbi.nlm.nih.gov/pubmed/26985134 http://dx.doi.org/10.5604/20831862.1185888 |
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