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Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance

Elizabeth Cornford, Richard Metcalfe Orcid Logo

European Journal of Sport Science, Pages: 1 - 8

Swansea University Author: Richard Metcalfe Orcid Logo

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DOI (Published version): 10.1080/17461391.2018.1545052

Abstract

Purpose: The effect of breakfast omission on evening high-intensity exercise performance has not previously been studied. Methods: In a randomised and counterbalanced cross-over design, 10 competitive rowers (2 male, 8 female; mean ± SD: age 21 ± 2 y, height 176 ± 7 cm, weight 76 ± 12 kg, body fat 1...

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Published in: European Journal of Sport Science
ISSN: 1746-1391 1536-7290
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa45951
first_indexed 2018-11-16T14:19:56Z
last_indexed 2018-12-13T14:07:18Z
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spelling 2018-12-13T10:38:09.5879900 v2 45951 2018-11-16 Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance 9bb783273dd9d54a2f3f66f75c43abdf 0000-0003-0980-2977 Richard Metcalfe Richard Metcalfe true false 2018-11-16 EAAS Purpose: The effect of breakfast omission on evening high-intensity exercise performance has not previously been studied. Methods: In a randomised and counterbalanced cross-over design, 10 competitive rowers (2 male, 8 female; mean ± SD: age 21 ± 2 y, height 176 ± 7 cm, weight 76 ± 12 kg, body fat 19.7 ± 6.8%) completed two trials (individualised carbohydrate-rich breakfast (BT; 831 ± 67 kcal eaten before 09:00) and no-breakfast (NBT; extended overnight fast until 12:00)). Following ad libitum afternoon food intake, participants completed a 2000-m time-trial on a rowing ergometer between 16:30 and 18:00. Appetite and energy intake were measured throughout the day, whilst power output, time, heart rate, blood lactate, blood glucose and RPE were assessed during the time trial. Results: Appetite ratings were higher throughout the morning in NBT compared with BT, but there were no differences in ratings in the afternoon. Energy intake at lunch was greater NBT compared with BT (1236 ± 594 vs 836 ± 303 kcal, p < .05), which partly compensated for breakfast omission, although overall energy intake tended to be lower in NBT compared with BT (1236 ± 594 vs 1589 ± 225 kcal, p = .08). The time taken to complete the 2000-m time trial was greater in NBT compared with BT (469.2 ± 43.4 vs 465.7 ± 43.3 s; p < .05). No differences in heart rate, blood glucose and blood lactate responses were apparent, but overall RPE was higher in NBT compared with BT (17.8 ± 0.9 vs 16.7 ± 0.7 au, p < .05). Conclusion: The omission of a carbohydrate-rich breakfast impaired evening performance during a 2000-m rowing time trial. This finding has implications for optimising evening high-intensity exercise performance. Journal Article European Journal of Sport Science 1 8 1746-1391 1536-7290 Exercise, nutrition, performance, physiology 31 12 2018 2018-12-31 10.1080/17461391.2018.1545052 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2018-12-13T10:38:09.5879900 2018-11-16T09:39:12.3685789 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences Elizabeth Cornford 1 Richard Metcalfe 0000-0003-0980-2977 2 0045951-16112018094218.pdf cornford2018.pdf 2018-11-16T09:42:18.7930000 Output 4193422 application/pdf Accepted Manuscript true 2019-11-15T00:00:00.0000000 true eng
title Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance
spellingShingle Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance
Richard Metcalfe
title_short Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance
title_full Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance
title_fullStr Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance
title_full_unstemmed Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance
title_sort Omission of carbohydrate-rich breakfast impairs evening 2000-m rowing time trial performance
author_id_str_mv 9bb783273dd9d54a2f3f66f75c43abdf
author_id_fullname_str_mv 9bb783273dd9d54a2f3f66f75c43abdf_***_Richard Metcalfe
author Richard Metcalfe
author2 Elizabeth Cornford
Richard Metcalfe
format Journal article
container_title European Journal of Sport Science
container_start_page 1
publishDate 2018
institution Swansea University
issn 1746-1391
1536-7290
doi_str_mv 10.1080/17461391.2018.1545052
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences
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description Purpose: The effect of breakfast omission on evening high-intensity exercise performance has not previously been studied. Methods: In a randomised and counterbalanced cross-over design, 10 competitive rowers (2 male, 8 female; mean ± SD: age 21 ± 2 y, height 176 ± 7 cm, weight 76 ± 12 kg, body fat 19.7 ± 6.8%) completed two trials (individualised carbohydrate-rich breakfast (BT; 831 ± 67 kcal eaten before 09:00) and no-breakfast (NBT; extended overnight fast until 12:00)). Following ad libitum afternoon food intake, participants completed a 2000-m time-trial on a rowing ergometer between 16:30 and 18:00. Appetite and energy intake were measured throughout the day, whilst power output, time, heart rate, blood lactate, blood glucose and RPE were assessed during the time trial. Results: Appetite ratings were higher throughout the morning in NBT compared with BT, but there were no differences in ratings in the afternoon. Energy intake at lunch was greater NBT compared with BT (1236 ± 594 vs 836 ± 303 kcal, p < .05), which partly compensated for breakfast omission, although overall energy intake tended to be lower in NBT compared with BT (1236 ± 594 vs 1589 ± 225 kcal, p = .08). The time taken to complete the 2000-m time trial was greater in NBT compared with BT (469.2 ± 43.4 vs 465.7 ± 43.3 s; p < .05). No differences in heart rate, blood glucose and blood lactate responses were apparent, but overall RPE was higher in NBT compared with BT (17.8 ± 0.9 vs 16.7 ± 0.7 au, p < .05). Conclusion: The omission of a carbohydrate-rich breakfast impaired evening performance during a 2000-m rowing time trial. This finding has implications for optimising evening high-intensity exercise performance.
published_date 2018-12-31T01:49:54Z
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score 11.04748

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