Advertisement

Perceived Fatigue Evaluating Model in Health Men Performing Backpack Load-Carriage Exercises

  • Yuhong Shen
  • Jiewen Zheng
  • Chenming Li
  • Yafei Guo
  • Pengfei Ren
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 318)

Abstract

Objectives This study aimed to develop a fatigue model for human load carriage during endurance exercise using quantification of perceived pains and physiological parameters. Methods Heart rate, skin contact pressure, and perceived pains and corresponding locations of five healthy participants were measured during treadmill tests on non-consecutive days under three different conditions of backpack payloads (29, 31.5, and 34 kg). Results All participants could complete the trials without resting using 29, 31.5, and 34 kg payloads for 50 min. The slopes for heart rate regression equations in three-payload conditions became steeper as the payload increased. The trends of root mean square (RMS) of skin contact pressure in back, shoulder, and hip regions are all changing smoothly. But the overall amplitudes of RMS of pressure in shoulder region in all three-payload conditions are higher comparing with other two regions. Perceived fatigue intensity results showed that shoulder region was the most discomfort region on the body and was highest using 34-kg payload. Conclusions The results suggested that shoulder fatigue may limit endurance performance, thereby indicating the importance of a well-designed shoulder strap. A fatigue intensity predictive model was proposed to allow prediction of human load carriage limits and fatigue intensity trend for endurance exercise.

Keywords

Backpacks Biomechanical assessment Load carriage Fatigue intensity predictive model Skin contact pressure 

References

  1. 1.
    Knapik JJ, Reynolds KL, Harman E (2004) Soldier load carriage: historical, physiological, biomechanical, and medical aspects. Mil Med 169(1):45–56Google Scholar
  2. 2.
    Roy TC, Knapik JJ, Ritland BM et al (2012) Risk factors for musculoskeletal injuries for soldiers deployed to Afghanistan. Aviat Space Environ Med 83(11):1060–1066CrossRefGoogle Scholar
  3. 3.
    Coalition Task Force 82, Coalition Joint Task Force 180 (2010) The modern Warrior’s combat load: dismounted operations in Afghanistan. CreateSpace Independent Publishing Platform, Seattle Google Scholar
  4. 4.
    Wenger HA, Bell GJ (1986) The interactions of intensity, frequency and duration of exercise training in altering cardiorespiratory fitness. Sports Med 3(5):346–356CrossRefGoogle Scholar
  5. 5.
    Tanaka H, Monahan KD, Seals DR (2001) Age-predicted maximal heart rate revisited. J Am Coll Cardiol 37(1):153–156CrossRefGoogle Scholar
  6. 6.
    Kenney WL, Wilmore JH, Costill D (2011) Physiology of sport and exercise, 5th edn. Human Kinetics, ChampaignGoogle Scholar
  7. 7.
    Holewijn M, Meeuwsen T (2001) Physiological strain during load carrying: effects of mass and type of backpack. Technical Report. ADP010987Google Scholar
  8. 8.
    Whiteside RA, Doan JE, Reid SA et al (1999) Integrated patrol pack and rucksack development phase IIIB: performance testing of suspension components. DCIEM-CR-2001-087Google Scholar
  9. 9.
    Holewijn M (1990) Physiological strain due to load carrying. Eur J Appl Physiol Occup Physiol 61(3–4):237–245Google Scholar
  10. 10.
    Knapik J, Harman E, Reynolds K (1996) Load carriage using packs: a review of physiological, biomechanical and medical aspects. Appl Ergon 27(3):207–216CrossRefGoogle Scholar
  11. 11.
    Hadcock LJ, Bryant JT, Stevenson JM (2002) Pressure and force distribution measurement for the design of waist belts in personal load carriage systems. Contract#W7711-0-7632-02/AGoogle Scholar
  12. 12.
    Morin EL, Stevenson JM, Reid SA et al (2005) Development of a dynamic biomechanical model for load carriage: phase V—development of the biomechanical model by means of the portable measurement system. ADA480769Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Yuhong Shen
    • 1
  • Jiewen Zheng
    • 1
  • Chenming Li
    • 1
  • Yafei Guo
    • 1
  • Pengfei Ren
    • 1
  1. 1.The Quartermaster Research Institute of the General Logistic DepartmentBeijingChina

Personalised recommendations