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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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METABOLIC DEMANDS OF MATCH PERFORMANCE IN YOUNG SOCCER PLAYERS |
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Alper Aslan1  ,
Caner Açıkada2, Alpay Güvenç3, Hasan Gören4,
Tahir Hazır2 and Asaf Özkara2 |
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1School of Physical Education and Sports, Mustafa Kemal University, Hatay, Turkey; 2School of Sport Sciences and Technology, Hacettepe University, Ankara, Turkey; 3School of Physical Education and Sports, Akdeniz University, Antalya, Turkey; 4Mathball Match Analysis Systems, Istanbul, Turkey. |
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© Journal of Sports Science and Medicine (2012) 11, 170 - 179 |
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| ABSTRACT | |||
| The aim of the present study was to determine metabolic responses,
movement patterns and distance covered at running speeds corresponding to
fixed blood lactate concentrations (FBLs) in young soccer players
during a match play. A further aim of the study was to evaluate the relationships
between FBLs, maximal oxygen consumption (VO2max)
and distance covered during a game. A multistage field test was administered
to 32 players to determine FBLs and VO2max. Blood
lactate (LA), heart rate (HR) and rate of perceived exertion (RPE) responses
were obtained from 36 players during tournament matches filmed using six
fixed cameras. Images were transferred to a computer, for calibration and
synchronization. In all players, values for LA and HR were higher and RPE
lower during the 1st half compared to the 2nd half of the matches (p <
0.01). Players in forward positions had higher LA levels than defenders,
but HR and RPE values were similar between playing positions. Total distance
and distance covered in jogging, low-moderate-high intensity running and
low intensity sprint were higher during the 1st half (p < 0.01). In the
1st half, players also ran longer distances at FBLs [p<0.01;
average running speed at 2mmol·L-1 (FBL2): 3.32 ± 0.31m·s-1 and average
running speed at 4mmol·L-1 (FBL4): 3.91 ± 0.25m·s-1]. There was a significant
difference between playing positions in distance covered at different running
speeds (p < 0.05). However, when distance covered was expressed as FBLs,
the players ran similar distances. In addition, relationships between FBLs
and total distance covered were significant (r = 0.482 to 0.570; p <
0.01). In conclusion, these findings demonstrated that young soccer players
experienced higher internal load during the 1st half of a game compared
to the 2nd half. Furthermore, although movement patterns of players differed
between playing positions, all players experienced a similar physiological
stress throughout the game. Finally, total distance covered was associated
to fixed blood lactate concentrations during play. Key words: Soccer, time motion analysis, blood lactate, heart rate, rate of perceived exertion. |
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