Abstract

MORTIMER, Lucas et al. Comparison between the effort intensity of young soccer players in the first and second halves of the soccer game. Rev. Port. Cien. Desp. [online]. 2006, vol.6, n.2, pp.154-159. ISSN 1645-0523.

Objective: Compare the effort intensity (IE) of young soccer players between the first and second halves of official games. Methods: 25 athletes were evaluated (17,5 ± 1,2 years; 8,5 ± 1,0% of body fat; 175,1 ± 6,8 cm; 69,3 ± 5,2 kg and VO2máx of 52,2 ± 3,3 mlO2•kg-1•min-1) who pertained to a club of the first division of the Brazilian soccer. Heart rate (HR) of the athletes was measured using a set of heart rate monitors, during official games, being 14 games of the under-17 category (U-17) and 8 games of the under-20 category (U-20). The maximal heart rate (MHR) for each athlete was considered as the highest HR observed during two maximal effort tests (race of 1000m and 2400m). In the cases which a higher value of HR was observed during game situations in relation to the tests, this was considered the MHR. Results were analyzed using Student t test and the accepted level of significance was p<0,05. Results: There was a significant difference (p<0,01) between the average HR and the percentage of maximal heart rate (%MHR) between first half (170 ± 8 bpm and 85,2 ± 4,5%MHR) and second half (166 ± 10 bpm e 82,7 ± 4,6%MHR). These results show a lower effort intensity in the second half of the game, in comparison with the first half.

Keywords : soccer; heart rate; effort intensity.

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