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The effect of high ambient temperature on the responses to a controlled football simulation

Hughes, M. G., Meyers, R., Nokes, Leonard Derek Martin, Oliver, J., Stembridge, M. and Stone, K. 2013. The effect of high ambient temperature on the responses to a controlled football simulation. Presented at: 18th Annual Congress of the European College of Sport Science, Barcelona, Spain, 26-29 June 2013.

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Abstract

Introduction The performance characteristics of match-play in football, such as the number of sprints and distance covered are thought to be reduced when ambient temperature is high (Ozgunen et al. 2010). However, assessment of the extent of additional fatigue due to temperature is difficult owing to the voluntary nature of football activity. The present study demonstrates the responses to a controlled football match-play simulation (Stone et al. 2011) performed in contrasting mean ambient temperatures of 19 and 27 degrees (‘normal’ and ‘hot’, respectively). Methods Semi-professional, male University football players (n=13) were tested. The procedure was divided into identical six 16-min blocks of activity, comprising sprinting and controlled-speed walking, jogging and running with a 15-min break to replicate half-time. The total distance covered in each trial was 11.2km. Single-sprint performance over 15m was assessed through each 16-min block. Midway through each 16-min block, one bout of repeated sprint (RS) exercise (6 x 15m starting every 18 seconds) was also used. All sprints were made from a standing start. Heart rate (HR) and blood lactate were monitored through the whole procedure. Data were analysed using 2 way (time * temperature) repeated measures ANOVA and Bonferroni post hoc. Significance was accepted at P<0.05. Data are reported as mean ± SD. Results Players consumed more fluid in ‘hot’ (‘hot’; 2.3 ± 0.6 vs. ‘normal’; 1.6 ± 0.6 l; P<0.05) with no significant difference in the change of body mass. Within the football simulation, mean RS speed was reduced in ‘hot’ by around 3% in the fourth (‘hot’; 5.49 ± 0.24 vs. ‘normal’ 5.65 ± 0.17 m/s; P<0.05) and sixth block (‘hot’; 5.47 ± 0.28 vs. ‘normal’ 5.64 ± 0.18 m/s; P<0.05). Similarly, mean single-sprint performance was lower by 2-3% in blocks 4, 5 and 6. Mean HR across the six blocks was significantly higher throughout ‘hot’ (‘hot’; 170 ± 9 vs. ‘normal’; 165 ± 10 bpm; P<0.05), however, blood lactate concentration was not different between the conditions (‘hot’ 5.3 ± 1.8 vs. ‘normal’; 4.8 ± 2.1 mM; P>0.05). Discussion The ‘hot’ trial led to more fatigue and greater HR than the ‘normal’ condition. Sprint performance over 15-m was slower by around 3% in ‘hot’ vs. ‘normal’ conditions and, in keeping with the match-play data from Ozgunen et al. (2010), the decline in performance was only significant in the second half of the simulation. By controlling distance covered and using standard exercise intensities for all but the sprints, these data show the extent to which ambient temperature is likely to influence responses to football match play. Stone, K. et al. (2011). Int. J. Sports Physiol. & Perform. 6: 427 - 431. Ozgunen, K.T. et al. (2010). Scand. J. Med. Sci. Sports 20. (Suppl 3): 140-147.

Item Type: Conference or Workshop Item (Paper)
Date Type: Completion
Status: Unpublished
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
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Last Modified: 04 Jun 2017 05:29
URI: http://orca.cf.ac.uk/id/eprint/51565

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