Next Article in Journal / Special Issue
Soccer and Relative Age Effect: A Walk among Elite Players and Young Players
Previous Article in Journal
Effect of Number of Players and Maturity on Ball-Drills Training Load in Youth Basketball
Previous Article in Special Issue
Content Validity and Psychometric Properties of the Nomination Scale for Identifying Football Talent (NSIFT): Application to Coaches, Parents and Players
Article Menu

Export Article

Open AccessArticle
Sports 2017, 5(1), 4; doi:10.3390/sports5010004

Poorer Intermittent Sprints Performance in Ramadan-Fasted Muslim Footballers despite Controlling for Pre-Exercise Dietary Intake, Sleep and Training Load

1
Sport Science Centre, Singapore Sports Institute, Sport Singapore, Singapore 397630, Singapore
2
Physical Education and Sport Science, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore
3
Advance Medical and Dental Institute, Universiti Sains Malaysia, Penang 13200, Malaysia
4
Faculty of Medicine, Asian Institute of Medicine, Science and Technology University, Kedah 08100, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Filipe Manuel Clemente
Received: 1 November 2016 / Revised: 23 December 2016 / Accepted: 28 December 2016 / Published: 6 January 2017
(This article belongs to the Special Issue Performance in Soccer)
View Full-Text   |   Download PDF [2563 KB, uploaded 6 January 2017]   |  

Abstract

This study examines the effects of Ramadan fasting on sprint performance during prolonged intermittent exercise in trained Muslim footballers, under controlled pre-exercise conditions. A within-group, cross-over study design with two non-fasted or Control trials performed before (i.e., CON1) and after (CON2) the Ramadan month, and with the Ramadan-fasted (RAM) trials performed within the Ramadan month. After familiarization, 14 players completed a modified 60-min (4 × 15-min exercise blocks interspersed with 3-min intervals) of the Loughborough Intermittent Shuttle Test (mLIST) of fixed speeds of walking, jogging, running, but with all-out effort sprints. During the interval periods, capillary blood glucose and blood lactate measures were taken, rectal and skin temperatures were recorded and maximal voluntary isometric contractions (MVIC) of the dominant leg and hand-grip were performed to provide some indication to the cause(s) of ‘fatigue’ during exercise. Players were provided with standardized 24-h pre-packed meals prior to all trials. Sleep hours were objectively assessed and perceived training loads were monitored and these were equivalent between RAM and CON trials. Sprint times throughout mLIST were significantly faster in both CON1 and CON2 as compared to RAM trials (all P < 0.017; d = small to moderate), and this poorer performance in RAM was observed as early as during the first 15-min of the mLIST. Blood markers, MVIC and thermoregulatory results were not substantially different between both CON and RAM trials. In conclusion, despite similarities in dietary intake, sleeping hours and training loads between conditions, results still indicate that Ramadan fasting had an adverse effect on prolonged intermittent performance. Nocebo effects plays a dominant role during exercise in the Ramadan-fasted state. View Full-Text
Keywords: intermittent fasting; fatigue; dehydration; placebo; football; intermittent sports intermittent fasting; fatigue; dehydration; placebo; football; intermittent sports
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Aziz, A.R.; Che Muhamad, A.M.; Roslan, S.R.; Ghulam Mohamed, N.; Singh, R.; Chia, M.Y.H. Poorer Intermittent Sprints Performance in Ramadan-Fasted Muslim Footballers despite Controlling for Pre-Exercise Dietary Intake, Sleep and Training Load. Sports 2017, 5, 4.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sports EISSN 2075-4663 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top