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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

Abstract

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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References

  1. 1.
    Grimmer K, Williams M (2000) Gender-age environmental associates of adolescent low back pain. Appl Ergon 31:343–360PubMedCrossRefGoogle Scholar
  2. 2.
    Whittfield JK, Legg SJ, Hedderley DI (2001) The weight and use of school bags in New Zealand secondary schools. Ergonomics 44:819–824PubMedCrossRefGoogle Scholar
  3. 3.
    Knapick JJ, Harman E, Reynolds K (1996) load carriage using packs: a review of physiological, biomechanical and medical aspects. Appl Ergon 27:207–216CrossRefGoogle Scholar
  4. 4.
    Voll H, Klimt F (1997) Strain in children caused by schoolbags. Offentl Gesundheitswes 39:369–378Google Scholar
  5. 5.
    Merati G, Negrini S, Sarchi P et al (2001) Cardio-respiratory adjustments and cost locomotion in school children during backpack walking (the Italian backpack study). Eur J Appl Physiol 85:41–48PubMedCrossRefGoogle Scholar
  6. 6.
    Rateau MR (2004) Use of backpacks in children and adolescents: a potential contributor of back pain. Orthop Nurs 23:101–105PubMedCrossRefGoogle Scholar
  7. 7.
    Epstein Y, Muza SR, Latzka WA, Pandole KB (1987) Alternation in pulmonary function caused by a backpack load. Med Sci Sports Exerc 19:531Google Scholar
  8. 8.
    Legg SJ, Cruz CO (2004) Effect of single and double strap backpacks on lung function. Ergonomics 47:318–323PubMedCrossRefGoogle Scholar
  9. 9.
    Holewijn M (1990) Physiological strain due to load carrying. Eur J Appl Physiol 61:237–245CrossRefGoogle Scholar
  10. 10.
    Hong Y, Li JX, Wong ASK, Robinson PD (2000) Effects of load carriage on heart rate, blood pressure and energy expenditure in children. Ergonomics 43:717–727PubMedCrossRefGoogle Scholar
  11. 11.
    Jacobson BH, Cook DA, Altina TS et al (2003) Comparison of perceived comfort differences between standard and experimental load carriage systems. Ergonomics 46:1035–1041PubMedCrossRefGoogle Scholar
  12. 12.
    Dochrell S, Kane C, O’Keefe E (2006) Schoolbag weight and the effects of schoolbag carriage on secondary school students. International Ergonomics Association Congress-Meeting Diversity in Ergonomics, 9th–14th July, Maastricht, HollandGoogle Scholar
  13. 13.
    Legg SJ, Perko L, Campbell P (1997) Subjective perceptual methods for comparing backpacks. Ergonomics 40:809–817PubMedCrossRefGoogle Scholar
  14. 14.
    Cook JM, Neuman DA (1987) The effects of load placement on the EMG activity of the low back muscle during load carrying by men and women. Ergonomics 30:1413–1423PubMedCrossRefGoogle Scholar
  15. 15.
    Piscione J, Gamet D (2006) Effect of mechanical compression due to load carrying on shoulder muscle fatigue during sustained isometric arm abduction: an electromyographic study. Eur J Appl Physiol 97:573–581PubMedCrossRefGoogle Scholar
  16. 16.
    Vacheron JJ, Poumarat G, Chandezon R, Vanneuville G (1999) Changes of contour of the spine caused by load carrying. Surg Radiol Anat 21:109–113PubMedCrossRefGoogle Scholar
  17. 17.
    Martin PE, Nelson RC (1986) The effect of carried loads on the walking patterns of men and women. Ergonomics 29:1191–1202PubMedCrossRefGoogle Scholar
  18. 18.
    Quesada PM, Mengelkoch LJ, Hale RC, Simon SR (2000) Biomechanical and metabolic effects of varying backpack loading on simulated marching. Ergonomics 43:293–309PubMedCrossRefGoogle Scholar
  19. 19.
    Griffin TM, Roberts TJ, Kram R (2003) Metabolic cost of generating muscular force in human walking: insights from load-carrying and speed experiments. J Appl Physiol 95:172–183PubMedGoogle Scholar
  20. 20.
    Kristin JS, Daniel GD, Amanda LW (2004) Effect of load position on physiological and perceptual responses during load carriage with an internal frame backpack. Ergonomics 47:784–789CrossRefGoogle Scholar
  21. 21.
    Liu BS (2007) Backpack load positioning and walking surface slope effects on physiological responses in infantry soldiers. Int J Industrial Ergon 37:754–760CrossRefGoogle Scholar
  22. 22.
    Lloyd R, Cooke CB (2000) The oxygen consumption with unloaded walking and load carriage using two different backpack designs. Eur J Appl Physiol 81:486–492PubMedCrossRefGoogle Scholar
  23. 23.
    Chansirinukor W, Wilson D, Grimmer K, Dansie B (2001) Effects of backpacks on students: measurements of cervical and shoulder posture. Austr J Physiother 47:110–116Google Scholar
  24. 24.
    Hong Y, Li JX (2005) Influence of load and carrying methods on gait phase and ground reactions in children’s stair walking. Gait Posture 22:63–68PubMedCrossRefGoogle Scholar
  25. 25.
    Wong ASK, Hong Y (1997) Walking pattern analysis of primary school children during load carriage on a treadmill. Med Sci Sports Exerc 29:85Google Scholar
  26. 26.
    Motmans RREE, Tomlow S, Visser D (2006) Trunk muscle activity in different modes of carrying schoolbags. Ergonomics 46:127–138CrossRefGoogle Scholar
  27. 27.
    Negrini S, Carabalona R (2002) Backpacks on! Schoolchildren’s perceptions of load, associations with back pain and factors determining the load. Spine 27:187–195PubMedCrossRefGoogle Scholar
  28. 28.
    Sheir-Neiss GI, Kruse RW, Rahman T et al (2003) The association of backpack use and backpain in adolescents. Spine 28:922–930PubMedCrossRefGoogle Scholar
  29. 29.
    Lai J, Jones A (2001) The effect of shoulder-girdle loading by a school bag on lung volumes in Chinese primary school children. Early Hum Dev 62:79–86PubMedCrossRefGoogle Scholar
  30. 30.
    Li JX, Hong Y, Robinson PD (2003) The effect of load carriage on movement kinematics and respiratory parameters in children during walking. Eur J Appl Physiol 90:35–43PubMedCrossRefGoogle Scholar
  31. 31.
    Pascoe DD, Pascoe DE, Wang YT et al (1997) Influence of carrying book bags on gait cycle and posture of youths. Ergonomics 40:631–641PubMedCrossRefGoogle Scholar
  32. 32.
    American College of Sports Medicine (2006) Resource manual for guidelines for exercise testing and prescription, 5th Edn. Williams and Wilkins, Baltimore, PhiladelphiaGoogle Scholar
  33. 33.
    American Academy of Orthopaedic Sergeons (2001) Kids and backpacks [on-line]. Available: http://orthoinfo.aaos.org/fact/thr_report.cfm?thread_id=105ℴpcategory=spine
  34. 34.
    Brackley HM, Stevenson JM (2004) Are children’s backpack weight limits enough? A critical review of the relevant literature. Spine 29:2184–2190PubMedCrossRefGoogle Scholar
  35. 35.
    Guyer R (2001) Backpack back pain. Am J Public Health 91:16–19PubMedCrossRefGoogle Scholar
  36. 36.
    Sagiv M, Sagiv M, Amir R, Ben-Sira D (2006) left ventricular systolic function during treadmill walking with load carriage in adolescents. J Sports Sci Med 5:202–207Google Scholar
  37. 37.
    Rowell, L (1986) Human circulation regulation during physical stress. Oxford University Press, New YorkGoogle Scholar
  38. 38.
    Wilmore JH, Costill DL (2004) Physiology of sport and exercise, 3rd Edn. Human Kinetics Publishers, Human Kinetics, USAGoogle Scholar
  39. 39.
    Yoshizaki H, Yoshida A, Hayashi F et al (1998) Effect of posture change on control of ventilation. Jpn J Physiol 48:267–273PubMedCrossRefGoogle Scholar
  40. 40.
    Pardy RL, Hussain SNA, Macklem PT (1984) The ventilatory pomp in exercise. Clin Chest Med 5:35–49PubMedGoogle Scholar
  41. 41.
    Boule M, Gaultier G, Girard F (1989) Breathing pattern during exercise in untrained children. Respir Physiol 75:225–233PubMedCrossRefGoogle Scholar
  42. 42.
    Armstrong N, Kirby B, McManus AM, Welsman JR (1997) Prepubescents’ ventilatory responses to exercise with reference to sex and body size. Chest 112:1554–1560PubMedCrossRefGoogle Scholar

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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