Sport Sciences for Health

, Volume 4, Issue 1–2, pp 7–14 | Cite as

Effect of carrying school backpacks on cardio-respiratory changes in adolescent students

  • H. DaneshmandiEmail author
  • F. Rahmani-Nia
  • S. H. Hosseini
Original Article


Fifteen male high school students (12.5±0.5 years) voluntarily participated in this study. They carried backpacks with 0 (as a control group), 8, 10.5 and 13% of their body weights on a treadmill at 1.1 m/s for 15 min. Their systolic (SBP) and diastolic (DBP) blood pressure was measured by a digital blood pressure meter, and heart rate (HR), minute ventilation (MV) and respiratory frequency (RF) by a Gas Analyzer System, in 3 positions: rest, exercise (15 min walking) and recovery (3 min after walking). The results indicated that the SBP and MV during and 3 min after carrying backpacks 10.5 and 13% of body weight were significantly higher than under 0 and 8% body weight load conditions. The DBP increased significantly only at the 13% body weight load condition, after 15 min of walking. The weight of school backpacks for high school students can be recommended as 8% of their body weight, because carrying 8% body weight load did not significantly change cardio-respiratory parameters.

Key words

School students Walking Backpack Cardio-respiratory parameters 


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Copyright information

© Springer-Verlag Italia 2008

Authors and Affiliations

  • H. Daneshmandi
    • 1
    Email author
  • F. Rahmani-Nia
    • 2
  • S. H. Hosseini
    • 2
  1. 1.Sport Injuries and Corrective Exercise, Faculty of P.E and Sport SciencesGuilan UniversityRashtIran
  2. 2.Sport Physiology, Faculty of P.E and Sport SciencesGuilan UniversityRashtIran

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