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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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DAILY PHYSICAL ACTIVITY AND PHYSICAL FITNESS IN 11-TO 15-YEAR-OLD TRAINED AND UNTRAINED TURKISH BOYS |
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Alpay Güvenç1  ,
Caner Açıkada2, Alper Aslan3 and Kamil Özer4 |
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1School of Physical Education and Sports, Akdeniz University, Antalya, Turkey, 2School of Sport Sciences and Technology, Hacettepe University, Ankara, Turkey, 3School of Physical Education and Sports, Mustafa Kemal University, Hatay, Turkey, 4School of Physical Education and Sports, Çanakkale Onsekiz Mart University, Çanakkale, Turkey |
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© Journal of Sports Science and Medicine (2011) 10, 502 - 514 |
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| ABSTRACT | |||
| The aims of this study were to assess levels and patterns of physical
activity (PA) in relation to age and regular sport activity, and to examine
its relationship to physical fitness in trained and untrained boys. One
hundred forty-seven 11-to 15- year-old boys (73 trained and 74 untrained)
participated in this study. Trained boys, comprised of 26 soccer, 25 handball
and 22 volleyball players, had been training regularly for at least one
year. The intensity, duration and frequency of PA were assessed from four
complete days of heart rate monitoring with 15-seconds sampling intervals.
Aerobic fitness was assessed by determining peakVO2 with a portable
breath-by-breath gas analyzer (Cosmed K4b2) and the running speeds
at fixed lactate concentrations during an incremental running test. Anaerobic
fitness was evalu-ated with the Wingate Anaerobic Test. Skinfold thicknesses
from eight sites and Tanner stages of pubic hair were also obtained. Based
on 15-s heart rate data, instead of continuous activity, multiple short
bouts of moderate and vigorous PA, lasting up to one minute, were characteristic
of daily PA patterns of both trained and untrained boys. PA levels of trained
boys were higher than untrained boys (p < 0.01) and the levels of PA
decreased with age and maturation in both groups (p < 0.05). Daily PA
variables were related to body fatness in both groups (p < 0.05), but
the relationships were not consistent in the trained group. Daily PA variables
were also related to aerobic fitness in the untrained group (p < 0.05)
and these relationships were somewhat better with vigorous PA, whereas in
the trained group, none of the PA variables were related to any of the aerobic
fitness indices (p > 0.05). No relationship was observed between PA variables
and anaerobic fitness in either group (p> 0.05). It seems that such relationships
may somewhat depend on the fitness level of the subjects. Key words: Physical activity, training, aerobic and anaerobic fitness, body fatness, children. |
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