Acta Gymnica 2015, 45(1):21-25 | DOI: 10.5507/ag.2015.003

Stability of internal response and external load during 4-a-side football game in an indoor environment

Karel Hùlka, Radim Weisser, Jan Bìlka, Pavel Háp
Faculty of Physical Culture, Palacký University, Olomouc, Czech Republic

Background: Small-sided games (SSG) are spontaneous forms of specific training where exercise intensity can be manipulated mainly by modifying external factors. When using the SSG, there is a risk that the variability of intensity between players and on repetition of SSG may lead to some players training at inappropriate exercise intensities.

Objective: The purpose of this study is to determine intra-individual repeatability and inter-individual variability in exercise intensity in small-sided 4on4 football games.

Methods: Twenty five highly trained junior football players (age 17.68 ± 1.52 years; BMI 23.8 ± 1.92 kg . m-2) participated in the study. Distance covered (software package Video Manual Motion Tracker 1.0) and heart rate (HR, expressed as a percentage of peak heart rate) were measured. All participants completed three measurements of 4-a-side games for three consecutive weeks.

Results: The high intraclass correlation coefficient value (Heart rate [HR]: ICC = .88, 95% CI [.65, .94]; Distance covered [DC]: ICC = .76, 95% CI [.66, .96]) implies a very high level of intra-individual repeatability. The Pearson's correlation coefficient value (HR: r = .93; DC: r = .85) indicates a high correlation between the results of any measurement. Bland and Altman's 95% limits of agreement were ± 10.32 beats . min-1 and ± 65.46 m of distance covered.

Conclusions: The results of this study demonstrated that measured SSG elicit consistent heart rate responses and external load of the players.

Keywords: time-motion analysis, heart rate, reliability

Published: March 31, 2015  Show citation

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Hùlka, K., Weisser, R., Bìlka, J., & Háp, P. (2015). Stability of internal response and external load during 4-a-side football game in an indoor environment. Acta Gymnica, 45(1), 21-25. doi: 10.5507/ag.2015.003
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