The mechanical properties of the heel pad in elderly adults

  • Hiroshi Kinoshita
  • Peter R. Francis
  • Tomohiko Murase
  • Satoru Kawai
  • Takenori Ogawa
Original Article
  • 110 Downloads

Abstract

The shock absorbing characteristics of the heel pad in vivo were examined in two groups of active elderly individuals whose ages ranged between 60 and 67 years (n = 10) and between 71 and 86 years (n = 10). For comparative purposes, young adults (n = 10) aged between 17 and 30 years were also examined. A free-fall impact testing device which consisted of an instrumented shaft (mass 5 kg), accelerometer and position detection transducer was used to obtain deceleration and deformation of the heel during impact. The data were obtained from impact velocities of 0.57 m · s−1 (slow) and 0.94 m · s−1 (fast). Peak values of the deceleration and deformation, as well as the time to these peaks from onset of impact, and energy absorption were evaluated. At the slow impact velocity, no age effect was found for the parameters examined except for the energy absorption. At the fast impact velocity, there was higher peak deceleration and smaller deformation for the elderly than for the younger adults. The energy absorbed was less for the elderly than for the younger adults. It was concluded that the capacity for shock absorbency of the heel pad declines with age.

Key words

Aging Heel pad Shock absorbency Impact test Energy absorption 

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References

  1. Aerts P, De Clercq D (1993) Deformation characteristics of the heel region of the shod foot during a simulated heel strike: the effect of varying midsole hardness. J Sports Sci 11:449–461Google Scholar
  2. Alexander R, McN Bennett BM, Ker RF (1986) Mechanical properties and function of the paw pads of some mammals. J Zool (Lond) A209:405–419Google Scholar
  3. Bennett MB, Ker RF (1990) The mechanical properties of the human subcalacaneal fat pad in compression. J Anat 171:131–138Google Scholar
  4. Cavanagh PR, Hinrich RN, Williams KR (1980) Testing procedure for the runners' world shoe survey. Runner's World October: 38–49Google Scholar
  5. Cavanagh PR, Valiant GA, Misevich KW (1984) Biological aspects of modelling shoe/foot interaction during running. In: Fredericks EC (ed) Sports shoes and playing surface. Human Kinetic, Champaign, Ill. pp 24–46Google Scholar
  6. Clarke TE, Frederick EC, Cooper LB (1983) Biomechanical measurement of running shoe cushioning properties. In: Nigg BM, Kerr BA (eds) Biomechanical aspects of sport shoes and playing surfaces, University of Calgary Press, Calgary, pp 25–33Google Scholar
  7. Frankel VH, Nordin M (1989) Basic biomechanics of the skeletal system. Lea and Febiger, Philadelphia, Pa.Google Scholar
  8. Denoth J (1986) Load on the locomotor system and modelling. In: Nigg BM (ed) Biomechanics of running shoes. Human Kinetic Champaign, Ill. pp 63–116Google Scholar
  9. Jahss MH, Kaye RA, Desai P, Watkins FB, Michelson JD, Kummer FJ (1991) Histology, histochemistry and biomechanics of the plantar fat pads. In: Jahss MH (ed) Disorders of the foot and ankle. Medical and surgical management 2nd edn. Saunders, Philadelphia, Pa., pp 2753–2762Google Scholar
  10. Jørgensen U (1985) Achillodynia and loss of heel pad shock absorbency. Am J Sports Med 13:121–132Google Scholar
  11. Jørgensen U, Bojesen-Møller F (1989) Shock absorbency of factors in the shoe/heel pad. Foot ankle 9:294–299Google Scholar
  12. Jørgensen U, Larsen E, Varmarken JE (1989) The HPC-device: a method to quantify the heel pad shock absorbency. Foot ankle 10:93–98Google Scholar
  13. Kinoshita H, Bates BT The effect of environmental temperature on the properties of running shoes. J Appl Biomech (in press)Google Scholar
  14. Kinoshita H, Ogawa T, Kuzuhara K, Ikuta K (1993) In vivo examination of the dynamic properties of the human heel pad. Int J Sports Med 14:312–319Google Scholar
  15. Kuhns JG (1949) Changes in elastic adipose tissue. J Bone Joint Surg 31A:542–547Google Scholar
  16. Marr S L, Pod FA (1980) The use of heel posting orthotic technique for relief of heel pain. Arch Orthop Trauma Surg 96:73–74Google Scholar
  17. Miller WE (1982) The heel pad. Am J Sports Med 10:19–21Google Scholar
  18. Nack JD, Phillips RD (1990) Shock absorption. Clin Podiatric Med Surg 7:391–397Google Scholar
  19. Nigg BM (1986) Experimental techniques used in running shoe research. In: Nigg BM (ed) Biomechanics of running shoes. Human Kinetics, Champaign Ill., pp 27–62Google Scholar
  20. Sewell JR, Black CM, Chapman AH, Statham J, Hughes GRV, Lavender JP (1980) Quantitative scintigraphy in diagnosis and management of plantar faciitis (calcaneal periostitis). Concise communication. J Nuclear Med 21:633–636Google Scholar
  21. Valiant GA, Cavanagh PR (1985) An in vivo determination of the mechanical characteristics of the human heel pad. J Biomech 18:242Google Scholar

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Hiroshi Kinoshita
    • 1
  • Peter R. Francis
    • 2
  • Tomohiko Murase
    • 1
  • Satoru Kawai
    • 3
  • Takenori Ogawa
    • 4
  1. 1.Faculty of Health and Sports ScienceOsaka UniversityOsakaJapan
  2. 2.Department of Exercise and Nutritional SciencesSan Diego State UniversitySan DiegoUSA
  3. 3.Department of Life ScienceTezukayama Jr. CollegeTezukayamaJapan
  4. 4.Department of Life ScienceHyogo University of EducationHyogoJapan

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