Skip to main content Accessibility help
×
Hostname: page-component-7479d7b7d-767nl Total loading time: 0 Render date: 2024-07-12T20:46:57.856Z Has data issue: false hasContentIssue false

3 - Gait characteristics and falls

Published online by Cambridge University Press:  03 May 2010

Stephen R. Lord
Affiliation:
Prince of Wales Medical Research Institute, Sydney
Catherine Sherrington
Affiliation:
University of Sydney
Hylton B. Menz
Affiliation:
Prince of Wales Medical Research Institute, Sydney and La Trobe University, Melbourne
Jacqueline C. T. Close
Affiliation:
Prince of Wales Medical Research Institute, Sydney and Prince of Wales Hospital, Sydney
Get access

Summary

‘Human walking is a unique activity during which the body, step by step, teeters on the brink of catastrophe … only the rhythmic forward movement of first one leg and then the other keeps man from falling flat on his face.’

(JR Napier, 1967.)

Habitual upright walking is a characteristically human trait that provides a unique set of physiological challenges. When standing erect, two-thirds of the body's mass is located two-thirds of the body height from the ground, precariously balanced on two narrow legs with the only direct contact with the ground provided by the feet. Such a structure challenges the basic principles of mechanical engineering and requires a highly developed postural control system to ensure that the body remains upright. However, in order to progress forwards, it is necessary to repeatedly initiate a forward fall and then ‘re-capture’ this momentum by the appropriate placement of the leading limb. The potential for a loss of balance when performing an apparently simple task such as walking is considerable. It is therefore not at all surprising that between 50% and 70% of falls in older people occur when walking. The aim of this chapter is to provide an overview of the literature pertaining to gait patterns in older people and their relationship to falls. Specifically, this chapter will address gait characteristics during level walking, stepping over and avoiding obstacles, stair walking, and the ability to respond to trips and slips.

Type
Chapter
Information
Falls in Older People
Risk Factors and Strategies for Prevention
, pp. 50 - 69
Publisher: Cambridge University Press
Print publication year: 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Napier, J., The antiquity of human walking. Scientific American, 216 (1967), 56–66.CrossRefGoogle ScholarPubMed
Winter, D. A., Patla, A. E. & Frank, J. S., Assessment of balance control in humans. Medical Progress Through Technology, 16 (1990), 31–51.Google ScholarPubMed
Cali, C. M. & Kiel, D. P., An epidemiologic study of fall-related fractures among institutionalized older people. Journal of the American Geriatrics Society, 43 (1995), 1336–40.CrossRefGoogle ScholarPubMed
Berg, W. P., Alessio, H. M., Mills, E. M. & Tong, C., Circumstances and consequences of falls in independent community-dwelling older adults. Age and Ageing, 26 (1997), 261–8.CrossRefGoogle ScholarPubMed
Norton, R., Campbell, A. J., Lee-Joe, T., Robinson, E. & Butler, M., Circumstances of falls resulting in hip fractures among older people. Journal of the American Geriatrics Society, 45 (1997), 1108–12.CrossRefGoogle ScholarPubMed
Murray, M. P., Drought, A. B. & Kory, R. C., Walking patterns of normal men. Journal of Bone and Joint Surgery, 46A (1964), 335–60.CrossRefGoogle Scholar
Murray, M. P., Kory, R. C. & Clarkson, B. H., Walking patterns in healthy old men. Journal of Gerontology, 24 (1969), 169–78.CrossRefGoogle ScholarPubMed
Finley, F. R., Cody, K. A. & Finizie, R. V., Locomotion patterns in elderly women. Archives of Physical Medicine and Rehabilitation, 50 (1969), 140–6.Google ScholarPubMed
Imms, F. J. & Edholm, O. G., Studies of gait and mobility in the elderly. Age and Ageing, 10 (1981), 147–56.CrossRefGoogle ScholarPubMed
Cunningham, D. A., Rechnitzer, P. A., Pearce, M. E. & Donner, A. P., Determinants of self-selected walking pace across ages 19 to 66. Journal of Gerontology, 37 (1982), 560–4.CrossRefGoogle Scholar
O'Brien, M., Power, K., Sanford, S., Smith, K. & Wall, J., Temporal gait patterns in healthy young and elderly females. Physiotherapy Canada, 35 (1983), 323–6.Google Scholar
Hagemon, P. A. & Blanke, D. J., Comparison of gait of young women and elderly women. Physical Therapy, 66 (1986), 1382–7.CrossRefGoogle Scholar
Elble, R. J., Thomas, S. S., Higgins, C. & Colliver, J., Stride-dependent changes in gait of older people. Journal of Neurology, 238 (1991), 1–5.CrossRefGoogle ScholarPubMed
Dobbs, R. J., Lubel, D. D., Charlett, A.et al., Hypothesis: age-associated changes in gait represent, in part, a tendency towards Parkinsonism. Age and Ageing, 21 (1992), 221–5.CrossRefGoogle ScholarPubMed
Dobbs, R. J., Charlett, A., Bowles, S. G.et al., Is this walk normal?Age and Ageing, 22 (1993), 27–30.CrossRefGoogle ScholarPubMed
Oberg, T., Karsznia, A. & Oberg, K., Basic gait parameters: reference data for normal subjects, 10–79 years of age. Journal of Rehabilitation Research and Development, 30 (1993), 210–23.Google ScholarPubMed
Fransen, M., Heussler, J., Margiotta, E. & Edmonds, J., Quantitative gait analysis – comparison of rheumatoid arthritic and non-arthritic subjects. Australian Journal of Physiotherapy, 40 (1994), 191–9.CrossRefGoogle ScholarPubMed
Buchner, D. M., Cress, M. E., Esselman, P. C.et al., Factors associated with changes in gait speed in older adults. Journal of Gerontology, 51A (1996), M297–302.Google Scholar
Lajoie, Y., Teasdale, N., Bard, C. & Fleury, M., Upright standing and gait: are there changes in attentional requirements related to normal aging?Experimental Aging Research, 22 (1996), 185–98.CrossRefGoogle ScholarPubMed
Lord, S. R., Lloyd, D. G. & Li, S. K., Sensori-motor function, gait patterns and falls in community-dwelling women. Age and Ageing, 25 (1996), 292–9.CrossRefGoogle ScholarPubMed
Bohannon, R. W., Comfortable and maximum walking speed of adults aged 20–79 years: reference values and determinants. Age and Ageing, 26 (1997), 15–19.CrossRefGoogle ScholarPubMed
Crowinshield, R. D., Brand, R. A. & Johnston, R. C., The effects of walking velocity and age on hip kinematics and kinetics. Clinical Orthopaedics and Related Research, 132 (1978), 140–4.Google Scholar
Winter, D. A., Patla, A. E., Frank, J. S. & Walt, S. E., Biomechanical walking pattern changes in the fit and healthy elderly. Physical Therapy, 70 (1990), 340–7.CrossRefGoogle ScholarPubMed
Ferrandez, A. -M., Pailhous, J. & Durup, M., Slowness in elderly gait. Experimental Aging Research, 16 (1990), 79–89.CrossRefGoogle ScholarPubMed
Jansen, E. C., Vittas, D., Hellberg, S. & Hansen, J., Normal gait of young and old men and women. Acta Orthpaedica Scandinavica, 53 (1982), 193–6.CrossRefGoogle Scholar
Kerrigan, D. C., Todd, M. K., Croce, U. D., Lipsitz, L. A. & Collins, J. J., Biomechanical gait alterations independent of speed in the healthy elderly: evidence for specific limiting impairments. Archives of Physical Medicine and Rehabilitation, 79 (1998), 317–22.CrossRefGoogle ScholarPubMed
Gill, J., Allum, J., Carpenter, M.et al., Trunk sway measures of postural stability during clinical balance tests: effects of age. Journal of Gerontology, 56A (2001), M438–47.Google Scholar
Judge, J. O., Davis, R. B. & Ounpuu, S., Step length reductions in advanced age: the role of ankle and hip kinetics. Journal of Gerontology, 51A (1996), M303–12.Google Scholar
Mills, P. & Barrett, R., Swing phase mechanics of healthy young and elderly men. Human Movement Science, 20 (2001), 427–46.CrossRefGoogle Scholar
McGibbon, C. & Krebs, D., Age-related changes in lower trunk coordination and energy transfer during gait. Journal of Neurophysiology, 85 (2001), 1923–31.CrossRefGoogle ScholarPubMed
McGibbon, C. A., Krebs, D. E. & Puniello, M. S., Mechanical energy analysis identifies compensatory strategies in disabled elders' gait. Journal of Biomechanics, 34 (2001), 481–90.CrossRefGoogle ScholarPubMed
McGibbon, C., Puniello, M. & Krebs, D., Mechanical energy transfer during gait in relation to strength impairment and pathology in elderly women. Clinical Biomechanics, 16 (2001), 324–33.CrossRefGoogle ScholarPubMed
Kernozek, T. W. & LaMott, E. E., Comparisons of plantar pressures between the elderly and young adults. Gait and Posture, 3 (1995), 143–8.CrossRefGoogle Scholar
Prakash, C. & Stern, G., Neurological signs in the elderly. Age and Ageing, 2 (1973), 24–7.CrossRefGoogle ScholarPubMed
Sudarsky, L., Geriatrics: gait disorders in the elderly. New England Journal of Medicine, 322 (1990), 1441–6.Google ScholarPubMed
L. Sudarsky & M. Ronthal, Gait disorders in the elderly: assessing the risk for falls. In Falls, Balance and Gait Disorders in the Elderly, ed. Vellas, B., Toupet, M., Rubenstein, L.et al. (Paris: Elsevier, 1992), pp. 117–27.Google ScholarPubMed
Woollacott, M. H. & Tang, P. -F., Balance control during walking in the older adult: research and its implications. Physical Therapy, 77 (1997), 646–60.CrossRefGoogle ScholarPubMed
Menz, H. B., Lord, S. R. & Fitzpatrick, R. C., Age-related differences in walking stability. Age and Ageing, 32 (2003), 137–42.CrossRefGoogle ScholarPubMed
Guimaraes, R. M. & Isaacs, B., Characteristics of the gait in old people who fall. International Journal of Rehabilitative Medicine, 2 (1980), 177–80.CrossRefGoogle ScholarPubMed
Luukinen, H., Koski, K., Laippala, P. & Kivela, S. -L., Risk factors for recurrent falls in the elderly in long-term institutional care. Public Health, 109 (1995), 57–65.CrossRefGoogle ScholarPubMed
Wolfson, L., Judge, J., Whipple, R. & King, M., Strength is a major factor in balance, gait, and the occurrence of falls. Journal of Gerontology, 50 (1995), S64–7.Google ScholarPubMed
Woo, J., Ho, S. C., Lau, J., Chan, S. G. & Yuen, Y. K., Age-associated gait changes in the elderly: pathological or physiological?Neuroepidemiology, 14 (1995), 65–71.CrossRefGoogle ScholarPubMed
Dargent-Molina, P., Favier, F., Grandjean, H.et al., Fall-related factors and risk of hip fracture: the EPIDOS prospective study. The Lancet, 348 (1996), 145–9.CrossRefGoogle ScholarPubMed
Ho, S. C., Woo, J., Chan, S. S., Yuen, Y. K. & Sham, A., Risk factors for falls in the Chinese elderly population. Journal of Gerontology, 51 (1996), M195–8.Google ScholarPubMed
VanSwearingen, J. M., Paschal, K. A., Bonino, P. & Yang, J. F., The modified gait abnormality rating scale for recognizing the risk of recurrent falls in community-dwelling elderly adults. Physical Therapy, 76 (1996), 994–1002.CrossRefGoogle ScholarPubMed
Maki, B. E., Gait changes in older adults: predictors of falls or indicators of fear?Journal of the American Geriatrics Society, 45 (1997), 313–20.CrossRefGoogle ScholarPubMed
Woolley, S. M., Czaja, S. J. & Drury, C. G., An assessment of falls in elderly men and women. Journal of Gerontology, 52A (1997), M80–7.Google Scholar
Klein, B. E., Klein, R., Lee, K. E. & Cruickshanks, K. J., Performance-based and self-assessed measures of visual function as related to history of falls, hip fractures, and measured gait time. The Beaver Dam Eye Study. Ophthalmology, 105 (1998), 160–4.CrossRefGoogle ScholarPubMed
Cho, C. -Y. & Kamen, G., Detecting balance deficits in frequent fallers using clinical and quantitative evaluation tools. Journal of the American Geriatrics Society, 46 (1998), 426–30.CrossRefGoogle ScholarPubMed
Nelson, A., Certo, L., Lembo, L.et al., The functional ambulation performance of elderly fallers and non-fallers walking at their preferred velocity. Neuro Rehabilitation, 13 (1999), 141–6.Google Scholar
Gunter, K., White, K., Hayes, W. C. & Snow, C. M., Functional mobility discriminates nonfallers from one-time and frequent fallers. Journal of Gerontology, 55 (2000), M672–6.Google ScholarPubMed
Eke-Okoro, S. T., A critical point for the onset of falls in the elderly. Gerontology, 46 (2000), 88–92.CrossRefGoogle ScholarPubMed
Clark, R. D., Lord, S. R. & Webster, I. W., Clinical parameters associated with falls in an elderly population. Gerontology, 39 (1993), 117–23.CrossRefGoogle Scholar
Lord, S. R. & Clark, R. D., Simple physiological and clinical tests for the accurate prediction of falling in older people. Gerontology, 42 (1996), 199–203.CrossRefGoogle ScholarPubMed
Hausdorff, J. M., Edelberg, H. K., Mitchell, S. L., Goldberger, A. L. & Wei, L. Y., Increased gait unsteadiness in community-dwelling elderly fallers. Archives of Physical Medicine and Rehabilitation, 78 (1997), 278–83.CrossRefGoogle ScholarPubMed
Hausdorff, J. M., Rios, D. A. & Edelberg, H. K., Gait variability and fall risk in community-living older adults: a 1-year prospective study. Archives of Physical Medicine and Rehabilitation, 82 (2001), 1050–6.CrossRefGoogle ScholarPubMed
Nakamura, T., Meguro, K. & Sasaki, H., Relationship between falls and stride length variability in senile dementia of the Alzheimer type. Gerontology, 42 (1996), 108–13.CrossRefGoogle ScholarPubMed
Hill, K., Schwarz, J., Flicker, L. & Carroll, S., Falls among healthy, community-dwelling, older women: a prospective study of frequency, circumstances, consequences and prediction accuracy. Australian and New Zealand Journal of Public Health, 23 (1999), 41–8.CrossRefGoogle ScholarPubMed
Mbourou, G., Lajoie, Y. & Teasdale, N., Step length variability at gait initiation in elderly fallers and non-fallers, and young adults. Gerontology, 49 (2003), 21–6.CrossRefGoogle ScholarPubMed
Gabell, A. & Nayak, U. S. L., The effect of age on variability in gait. Journal of Gerontology, 39 (1984), 662–6.CrossRefGoogle Scholar
Weller, C., Humphrey, S. J. E., Kirollos, C.et al., Gait on a shoestring: falls and foot separation in Parkinsonism. Age and Ageing, 21 (1992), 242–4.CrossRefGoogle ScholarPubMed
Heitmann, D. K., Gossman, M. R., Shaddeau, S. A. & Jackson, J. R., Balance performance and step width in noninstitutionalized, elderly, female fallers and nonfallers. Physical Therapy, 69 (1989), 923–31.CrossRefGoogle ScholarPubMed
Gehlsen, G. M. & Whaley, M. H., Falls in the elderly. Part I. Gait. Archives of Physical Medicine and Rehabilitation, 71 (1990), 735–8.Google ScholarPubMed
Lee, L. W. & Kerrigan, D. C., Identification of kinetic differences between fallers and nonfallers in the elderly. American Journal of Physical Medicine and Rehabilitation, 78 (1999), 242–6.CrossRefGoogle ScholarPubMed
Kerrigan, D. C., Lee, L. W., Nieto, T. J.et al., Kinetic alterations independent of walking speed in elderly fallers. Archives of Physical Medicine and Rehabilitation, 81 (2000), 730–5.CrossRefGoogle ScholarPubMed
Kerrigan, D. C., Lee, L. W., Collins, J. J., Riley, P. O. & Lipsitz, L. A., Reduced hip extension during walking: healthy elderly and fallers versus young adults. Archives of Physical Medicine and Rehabilitation, 82 (2001), 26–30.CrossRefGoogle ScholarPubMed
Feltner, M. E., MacRae, P. G. & McNitt-Gray, J. L., Quantitative gait assessment as a predictor of prospective and retrospective falls in community-dwelling older women. Archives of Physical Medicine and Rehabilitation, 75 (1994), 447–53.CrossRefGoogle ScholarPubMed
Yack, H. J. & Berger, R. C., Dynamic stability in the elderly: identifying a possible measure. Journal of Gerontology, 48 (1993), M225–30.CrossRefGoogle ScholarPubMed
Simoneau, G. G. & Krebs, D. E., Whole-body momentum during gait: a preliminary study of non-fallers and frequent fallers. Journal of Applied Biomechanics, 16 (2000), 1–13.CrossRefGoogle Scholar
Menz, H. B., Lord, S. R. & Fitzpatrick, R. C., Acceleration patterns of the head and pelvis when walking on level and irregular surfaces. Gait and Posture, 18 (2003), 35–46.CrossRefGoogle ScholarPubMed
Menz, H. B., Lord, S. R. & Fitzpatrick, R. C., Acceleration patterns of the head and pelvis when walking are associated with risk of falling in community-dwelling older people. Journal of Gerontology, 58A (2003), M446–452.Google Scholar
DiFabio, R. P., Emasithi, A., Greany, J. F. & Paul, S., Supression of the vertical vesibulo-ocular reflex in older persons at risk of falling. Acta Otolaryngologica, 121 (2001), 707–14.Google Scholar
DiFabio, R. P., Greany, J. F., Emasithi, A. & Wyman, J. F., Eye-head coordination during postural perturbation as a predictor of falls in community-dwelling elderly women. Archives of Physical Medicine and Rehabilitation, 83 (2002), 942–51.CrossRefGoogle Scholar
Duncan, P. W., Chandler, J., Studenski, S., Hughes, M. & Prescott, B., How do physiological components of balance affect mobility in elderly men?Archives of Physical Medicine and Rehabilitation, 74 (1993), 1343–9.CrossRefGoogle ScholarPubMed
Bassey, E. J., Bendall, M. J. & Pearson, M., Muscle strength in the triceps surae and objectively measured customary walking activity in men and women over 65 years of age. Clinical Science, 74 (1988), 85–9.CrossRefGoogle ScholarPubMed
Buchner, D. M., Larson, E. B., Wagner, E. H., Koepsell, T. D. & DeLateur, B. J., Evidence for a non-linear relationship between leg strength and gait speed. Age and Ageing, 25 (1996), 386–91.CrossRefGoogle ScholarPubMed
Brown, L., Gage, W., Polych, M., Sleik, R. & Winder, T., Central set influences on gait: age-dependent effects of postural threat. Experimental Brain Research, 145 (2002), 286–96.CrossRefGoogle ScholarPubMed
Herman, T., Giladi, N., Gurevich, T. & Hausdorff, J. M., Gait instability and fractal dynamics of older adults with a “cautious” gait: why do certain older adults walk fearfully?Gait and Posture, 21 (2005), 178–85.CrossRefGoogle ScholarPubMed
Menz, H. B., Lord, S. R. & Fitzpatrick, R. C., A structural equation model relating sensori-motor function, fear of falling and gait patterns in older people. Gait and Posture, (2006), in press.Google Scholar
Escalante, A., Lichtenstein, M. J. & Hazuda, H. P., Walking velocity in aged persons: its association with lower extremity joint range of motion. Arthritis Care and Research, 45 (2001), 287–94.3.0.CO;2-1>CrossRefGoogle ScholarPubMed
Kerrigan, D., Xenopoulos-Oddsson, A., Sullivan, M., Lelas, J. & Riley, P., Effect of a hip flexor stretching program on gait in the elderly. Archives of Physical Medicine and Rehabilitation, 84 (2003), 1–6.CrossRefGoogle ScholarPubMed
Overstall, P. W., Exton-Smith, A. N., Imms, F. J. & Johnson, A. L., Falls in the elderly related to postural imbalance. British Medical Journal, 1 (1977), 261–4.CrossRefGoogle ScholarPubMed
Blake, A., Morgan, K., Bendall, M.et al., Falls by elderly people at home – prevalence and associated factors. Age and Ageing, 17 (1988), 365–72.CrossRefGoogle ScholarPubMed
Campbell, A. J., Borrie, M. J., Spears, G. F.et al., Circumstances and consequences of falls experienced by a community population 70 years and over during a prospective study. Age and Ageing, 19 (1990), 136–41.CrossRefGoogle ScholarPubMed
Teno, J., Kiel, D. P. & Mor, V., Multiple stumbles: a risk factor for falls in community-dwelling elderly. A prospective study. Journal of the American Geriatrics Society, 38 (1990), 1321–5.CrossRefGoogle ScholarPubMed
McFadyen, B. J. & Winter, D. A., Anticipatory locomotor adjustments during obstructed human walking. Neuroscience Research Communications, 9 (1991), 37–44.Google Scholar
Chen, H. -C., Ashton-Miller, J. A., Alexander, N. B. & Schultz, A. B., Stepping over obstacles: gait patterns of healthy young and old adults. Journal of Gerontology, 46 (1991), M196–203.CrossRefGoogle ScholarPubMed
Chou, L. -S., Kaufman, K. R., Brey, R. H. & Draganich, L. F., Motion of the whole body's center of mass when stepping over obstacles of different heights. Gait and Posture, 13 (2001), 17–26.CrossRefGoogle ScholarPubMed
Chou, L. -S. & Draganich, L. F., Increasing obstacle height and decreasing toe-obstacle distance affect the joint moments of the stance limb differently when stepping over an obstacle. Gait and Posture, 8 (1998), 186–204.CrossRefGoogle ScholarPubMed
Begg, R., Sparrow, W. & Lythgo, N., Time-domain analysis of foot-ground reaction forces in negotiating obstacles. Gait and Posture, 7 (1998), 99–109.CrossRefGoogle ScholarPubMed
Chou, L. & Draganich, L., Stepping over an obstacle increases the motions and moments of the joints of the trailing limb in young adults. Journal of Biomechanics, 30 (1997), 331–7.CrossRefGoogle ScholarPubMed
Chen, H. -C., Ashton-Miller, J. A., Alexander, N. B. & Schultz, A. B., Effects of age and available response time on ability to step over an obstacle. Journal of Gerontology, 49 (1994), M227–33.CrossRefGoogle ScholarPubMed
Chen, H. -C., Schultz, A. B., Ashton-Miller, J. A.et al., Stepping over obstacles: dividing attention impairs performance of old more than young adults. Journal of Gerontology, 51A (1996), M116–22.Google Scholar
Cao, C., Ashton-Miller, J. A., Schultz, A. B. & Alexander, N. B., Abilities to turn suddenly while walking: effects of age, gender, and available response time. Journal of Gerontology, 52A (1997), M888–93.Google Scholar
Gilchrist, L. A., Age-related changes in the ability to side-step during gait. Clinical Biomechanics, 13 (1998), 91–7.CrossRefGoogle ScholarPubMed
Tirosh, O. & Sparrow, , Gait termination in young and older adults: effects of stopping stimulus probability and stimulus delay. Gait and Posture, 19 (2004), 243–51.CrossRefGoogle Scholar
Patla, A. E., Understanding the role of vision in the control of human locomotion. Gait and Posture, 5 (1997), 54–69.CrossRefGoogle Scholar
Lamoureux, E. L., Sparrow, W. A., Murphy, A. & Newton, R. U., The relationship between lower body strength and obstructed gait in community-dwelling older adults. Journal of the American Geriatrics Society, 50 (2002), 468–73.CrossRefGoogle ScholarPubMed
Draganich, L., Zacny, J., Klafta, J. & Karrison, T., The effects of antidepressants on obstructed and unobstructed gait in healthy elderly people. Journal of Gerontology, 56A (2001), M36–41.Google Scholar
Williamson, J. & , L F, Characterization of older adults who attribute functional decrements to “old age”. Journal of the American Geriatrics Society, 44 (1996), 1429–34.CrossRefGoogle ScholarPubMed
Startzell, J. K., Owens, D. A., Mulfinger, L. M. & Cavanagh, P. R., Stair negotiation in older people: a review. Journal of the American Geriatrics Society, 48 (2000), 567–80.CrossRefGoogle ScholarPubMed
Cohen, H. H., Templer, J. & Archea, J., An analysis of occupational stair accident patterns. Journal of Safety Research, 16 (1985), 178–81.CrossRefGoogle Scholar
Tinetti, M. E., Factors associated with serious injury during falls by ambulatory nursing home residents. Journal of the American Geriatrics Society, 35 (1987), 644–8.CrossRefGoogle ScholarPubMed
Andriacchi, T. P., Andersson, G. B. J., Fermier, R. W., Stern, D. & Galante, J. O., A study of lower-limb mechanics during stair climbing. Journal of Bone and Joint Surgery, 62A (1980), 749–57.CrossRefGoogle Scholar
Lyons, K., Perry, J., Gronley, J. K., Barnes, L. & Antonelli, D., Timing and relative intensity of hip extensor and abductor muscle action during level and stair ambulation. Physical Therapy, 63 (1983), 1597–605.CrossRefGoogle ScholarPubMed
McFadyen, B. J. & Winter, D. A., An integrated biomechanical analysis of normal stair ascent and descent. Journal of Biomechanics, 21 (1988), 733–44.CrossRefGoogle ScholarPubMed
Zachazewski, J. E., Riley, P. O. & Krebs, D. E., Biomechanical analysis of body mass transfer during stair ascent and descent of healthy subjects. Journal of Rehabilitation Research and Development, 30 (1993), 412–22.Google ScholarPubMed
Christina, K. & Cavanagh, P., Ground reaction forces and frictional demands during stair descent: effects of age and illumination. Gait and Posture, 15 (2002), 153–8.CrossRefGoogle ScholarPubMed
Simoneau, G. G., Cavanagh, P. R., Ulbrecht, J. S., Leibowitz, H. W. & Tyrrell, R. A., The influence of visual factors on fall-related kinematic variables during stair descent by older women. Journal of Gerontology, 46 (1991), M188–95.CrossRefGoogle ScholarPubMed
Williams, K., Intralimb coordination of older adults during locomotion: stair climbing. Journal of Human Movement Studies, 30 (1996), 269–84.Google Scholar
Williams, K., Intralimb coordination of older adults during locomotion: stair descent. Journal of Human Movement Studies, 34 (1998), 96–117.Google Scholar
Hortobagyi, T. & DeVita, P., Altered movement strategy increases lower extremity stiffness during stepping down in the aged. Journal of Gerontology, 54A (1999), B63–70.Google Scholar
Hortobagyi, T. & DeVita, P., Muscle pre- and coactivity during downward stepping are associated with leg stiffness in aging. Journal of Electromyography and Kinesiology, 10 (2000), 117–26.CrossRefGoogle Scholar
Lark, S. D., Buckley, J. G., Bennett, S., Jones, D., Sargeant, A. J., Joint torques and dynamic joint stiffness in elderly and young men during stepping down. Clinical Biomechanics, 18 (2003), 848–55.CrossRefGoogle Scholar
Begg, R. & Sparrow, W., Gait characteristics of young and older individuals negotiating a raised surface: implications for the prevention of falls. Journal of Gerontology, 55A (2000), M147–54.Google Scholar
Buckley, J. G., Heasley, K. J., Twigg, P. & Elliott, D. B., The effects of blurred vision on the mechanics of landing during stepping down by the elderly. Gait and Posture, 21 (2005), 65–71.CrossRefGoogle ScholarPubMed
Buckley, J. G., Heasley, K., Scally, A. & Elliott, D. B., The effects of blurring vision on medio-lateral balance during stepping up or down to a new level in the elderly. Gait and Posture, 22 (2005), 146–53.CrossRefGoogle ScholarPubMed
Lord, S. R., Dayhew, J. & Howland, A., Multifocal glasses impair edge-contrast sensitivity and depth perception and increase the risk of falls in older people. Journal of the American Geriatrics Society, 50 (2002), 1760–6.CrossRefGoogle ScholarPubMed
Prudham, D. & Evans, J. G., Factors associated with falls in the elderly: a community study. Age and Ageing, 10 (1981), 141–6.CrossRefGoogle ScholarPubMed
Campbell, A. J., Reinken, R., Allan, B. C. & Martinez, G. S., Falls in old age: a study of frequency and related clinical factors. Age and Ageing, 10 (1981), 264–70.CrossRefGoogle ScholarPubMed
Tinetti, M. E., Speechley, M. & Ginter, S. F., Risk factors for falls among elderly persons living in the community. New England Journal of Medicine, 319 (1988), 1701–7.CrossRefGoogle ScholarPubMed
Lord, S. R., Ward, J. A., Williams, P. & Anstey, K. J., An epidemiological study of falls in older community-dwelling women: the Randwick Falls and Fractures Study. Australian Journal of Public Health, 17 (1993), 240–54.CrossRefGoogle ScholarPubMed
Pavol, M. J., Owings, T. M., Foley, K. T. & Grabiner, M. D., The sex and age of older adults influence the outcome of induced trips. Journal of Gerontology, 54A (1999), M103–8.Google Scholar
Pavol, M. J., Owings, T. M., Foley, K. T. & Grabiner, M. D., Gait characteristics as risk factors for falling from trips induced in older adults. Journal of Gerontology, 54A (1999), M583–90.Google Scholar
Pavol, M. J., Owings, T. M., Foley, K. T. & Grabiner, M. D., Mechanisms leading to a fall from an induced trip in healthy older adults. Journal of Gerontology, 56 (2001), M428–37.Google ScholarPubMed
Bogert, A.vanden, Pavol, M. J., Grabiner, M. D., Response time is more important than walking speed for the ability of older adults to avoid a fall after a trip. Journal of Biomechanics, 35 (2002), 199–205.CrossRefGoogle ScholarPubMed
Smeesters, C., Hayes, W. C. & McMahon, T. A., The threshold trip duration for which recovery is no longer possible is associated with strength and reaction time. Journal of Biomechanics, 34 (2001), 589–95.CrossRefGoogle ScholarPubMed
Pijnappels, M., Bobbert, M. F. & Dieen, J. H., Push-off reactions in recovery after tripping discriminate young subjects, older non-fallers and older fallers. Gait and Posture, 21 (2005), 388–94.CrossRefGoogle ScholarPubMed
Pijnappels, M., Bobbert, M. F. & Dieen, J. H., Control of support limb muscles in recovery after tripping in young and older subjects. Experimental Brain Research, 160 (2005), 326–33.CrossRefGoogle Scholar
Owings, T. M., Pavol, M. J. & Grabiner, M. D., Mechanisms of failed recovery following postural perturbations on a motorized treadmill mimic those associated with an actual forward trip. Clinical Biomechanics, 16 (2001), 813–19.CrossRefGoogle ScholarPubMed
R. J. Best, Tripping probability during gait: a theoretical basis for research. Book of Abstracts from the Australian Falls Prevention Conference, November 2004, Manly, Australia, pp. 55.
Gabell, A., Simons, M. A. & Nayak, U. S. L., Falls in the healthy elderly: predisposing causes. Ergonomics, 28 (1985), 965–75.CrossRefGoogle ScholarPubMed
Smeesters, C., Hayes, W. C. & McMahon, T. A., Disturbance type and gait speed affect fall direction and impact location. Journal of Biomechanics, 34 (2001), 309–17.CrossRefGoogle ScholarPubMed
Redfern, M., Cham, R. & Gielo-Perczak, K.et al., Biomechanics of slips. Ergonomics, 44 (2001), 1138–66.CrossRefGoogle ScholarPubMed
Pai, Y. -C. & Iqbal, K., Simulated movement termination for balance recovery: can movement strategies be sought to maintain stability in the presence of slipping or forced sliding?Journal of Biomechanics, 32 (1999), 779–86.CrossRefGoogle ScholarPubMed
Bhatt, T., Wening, J. D. & Pai, Y. -C., Influence of gait speed on stability: recovery from anterior slips and compensatory stepping. Gait and Posture, 21 (2005), 146–56.CrossRefGoogle ScholarPubMed
Strandberg, L. & Lanshammar, H., The dynamics of slipping accidents. Journal of Occupational Accidents, 3 (1981), 153–62.CrossRefGoogle Scholar
Strandberg, L., On accident analysis and slip resistance measurement. Ergonomics, 26 (1983), 11–32.CrossRefGoogle ScholarPubMed
Brady, R., Pavol, M. J., Owings, T. M. & Grabiner, M. D., Foot displacement but not velocity predicts the outcome of a slip induced in young subjects while walking. Journal of Biomechanics, 33 (2000), 803–8.CrossRefGoogle ScholarPubMed
You, J. -Y., Chou, Y. -L., Lin, C. -J., Su, F. -C., Effect of slip on movement of body center of mass relative to base of support. Clinical Biomechanics, 16 (2001), 167–73.CrossRefGoogle ScholarPubMed
Tang, P. -F., Woollacott, M. H. & Chong, R. K. Y., Control of reactive balance adjustments in perturbed human walking: roles of proximal and distal postural muscle activity. Experimental Brain Research, 119 (1998), 141–52.CrossRefGoogle ScholarPubMed
Cham, R. & Redfern, M., Lower extremity corrective reactions to slip events. Journal of Biomechanics, 34 (2001), 1439–45.CrossRefGoogle ScholarPubMed
Tang, P. -F. & Woollacott, M. H., Inefficient postural responses to unexpected slips during walking in older adults. Journal of Gerontology, 53A (1998), M471–80.Google Scholar
Cham, R. & Redfern, M., Changes in gait when anticipating slippery floors. Gait and Posture, 15 (2002), 159–71.CrossRefGoogle ScholarPubMed
Marigold, D. & Patla, A., Strategies for dynamic stability during locomotion on a slippery surface: effects of prior experience and knowledge. Journal of Neurophysiology, 88 (2002), 339–53.CrossRefGoogle ScholarPubMed
Rogers, M., Johnson, M., Martinez, K., Mille, M. & Hedman, L., Step training improves the speed of voluntary step initiation in aging. Journal of Gerontology, 58A (2003), M46–51.Google Scholar

Save book to Kindle

To save this book to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×