| Summary: | 碩士 === 國立體育學院 === 教練研究所 === 91 === In order to investigate the physiological intensity of carrying schoolbags, oxygen consumption and heart rate during walking and stair climbing with different schoolbag carrying styles were assessed. In pilot study, 1164 elementary school students’ schoolbag carrying styles and schoolbag weight in Taipei City were collected. Twelve subjects (aged 11-12) studying at the 6th grade at Taipei Municipal Zhung Zheng Elementary School, were invited to be participants. All the subjects walked on land and stairs, carrying 4.2kg’s schoolbag which was derived from pilot study with styles of both-shouldered carrying, single-shouldered carrying, hand-hanging and schoolbag wheels pulling at the speed of 100 m/min by balanced order. During the walking and up stair experiment, oxygen consumption and heart rate were continuously recorded by K2B4 and Polar. Collected data were compared by One-Way ANOVA.
The average carrying load of schoolbags was 10.2% of body weight (4.2 kg) and the higher carrying load was found in 3rd and 4th Grade boy school bags (11.6% and 10.4% of body weight). There was 31.89% of students carry schoolbags over the recommended relative weight of Educational Bureau. Oxygen consumption of walking on land with different carrying styles was significantly higher than that with carrying nothing (P<.05). No significances of oxygen consumption were found among carrying styles. Oxygen consumption of walking up stairs was significantly higher than that with carrying nothing. No significances of oxygen consumption were found among carrying styles. The heart rates of walking on land and stairs with different carrying styles (118.28-123.50 beat/min or 58.78-61.14 % HRmax vs. 136.36 - 142.25 beat/min or 67.50-70.55 %) significantly higher than that with carrying nothing (118.28 beat/min or 58.55 % HRmax vs. 135.48 or 67.07 % HRmax).
The author concludes that both-shouldered carrying is an economic way to carrying schoolbag and suggests special attention should be paid on those who carry schoolbags over recommended relative weight from Educational Bureau.
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