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- Title
Influence of backpack carriage on physiological function of school students.
- Authors
Daneshmandi, H.; Rahmani-Nia, F.; Hosseini, S. H.
- Abstract
The purpose of this study was to investigate the influence of backpacks carriage with different weights on some physiological functions in 12.5-year-old male students. Fifteen volunteers (height: 163±1.7cm, and weight: 51±1.4kg) were selected to carry school backpacks of 8, 10.5, and 13 % of their own body weights on a treadmill at the 3.9 km.h-1 for 15 mm, were 0% body weight was used as control. Respiratory frequency (RF), minute ventilation (Mv), heart rate (HR), energy expenditure (EE), and oxygen consumption (VO2) of subjects were measured by Gas Analyzer System, in each of the carriage tests, in 3 situations: rest, exercise (15 mm walking) and recovery (3 mm after walking). The Repeated-measures ANOVA and paired t-test were used for statistical analysis of data in significant level of p ⩽0.05. The results indicated that the MV, EE and VO2 during and 3 mm after carrying backpacks equal to 10.5 and 13% of body weight were significantly higher than in 0 & 8% of body weight load conditions (p<0.025). No significant differences were found in RF and HR values among different load conditions (p>0.05). Walking with backpack equal to 8% of body weight did not significantly change physiological parameters (p>0.05). Thus, the weight of backpack for high school students can be recommended as 8% of their body weight.
- Subjects
SCHOOLBAGS; PHYSIOLOGICAL aspects of body weight; HEART beat measurement; OXYGEN consumption measurement; GAS analysis equipment; ANALYSIS of variance; T-test (Statistics)
- Publication
International Journal of Fitness, 2011, Vol 7, Issue 1, p59
- ISSN
0973-2152
- Publication type
Article