Weight distribution and postural sway in healthy adults

Abstract

An investigation of postural sway and bodyweight distribution in standing was carried out using the Nottingham Balance Platform (NBP). The aims were to provide normative data for subsequent studies on stroke patients and to show the effect of age and sex on these variables. Male and female volunteers were recruited from hospital workers, hospital visitors and members of a local community centre. Each subject was assessed using the N BP, a limb load monitor based on load cells and a microcomputer. Weight distribution was expressed as the balance coefficient, which is the mean proportion of body weight on the left leg calculated over 30 seconds. Postural sway was calculated from the deviation from that mean and expressed as the sway coefficient. The 403 volunteers included 269 women and 134 men, age range 18-87 years (mean 50). There was a significant difference between the sexes for both postural sway (p < 0.05) and weight distribution (p < 0.01) and significant correlations between age and postural sway (p < 0.001) and age and weight distribution (p < 0.001). The results provided baseline data allowing for age and sex differences for further studies with stroke patients.

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References

Bobath B. Adult hemiplegia: evaluation and treatment, third ed. London: William Heinemann, 1978: 160.

Lane Rej. Facilitation of weight transference in the stroke patient. Physiotherapy 1978; 65: 48-51.

Carr JH , Shepherd R. Physiotherapy in disorders of the brain. London: William Heinemann, 1980: 150.

Dickstein R. , Nissan M. , Pillar T. , Scheer D. Foot-ground pressure patterns of standing hemiplegic patients. Phys Ther 1984; 64: 19-23.

Caldwell C. , Macdonald D. , Macneil K. , McFarland K. , Turnbull GI , Wall JC Symmetry of weight distribution in normals and stroke patients using digital weigh scales. Physiotherapy Practice 1986; 2: 109-16.

Bohannon RW , Larkin PA Lower extremity weight bearing under various standing conditions in independently ambulatory patients with hemiparesis. Phys Ther 1985; 65: 1323-25.

Murray PM , Peterson RM Weight distribution and weight-shift activity during normal standing posture . Phys Ther 1973; 53: 741-48.

Belenki VY , Gurfinkel VS , Paltsev Y. Elements of control of voluntary movements. Biofizika 1967; 12: 135-41.

Weissman S. , Dzendolet E. Effects of visual cues on the standing body sway of males and females. Percept Mot Skills 1972; 34: 951-59.

10.

Fernie GR , Holliday PJ Postural sway in amputees and normal subjects. J Bone Joint Surg [BR] 1978; 60: 895-98.

11.

Overstall PW , Exton-Smith AN , et al. Falls in the elderly related to postural imbalance. Br Med J 1977; 1: 261-64.

12.

Stribley RF , Albers JW , et al. A quantitative study of stance in normal subjects. Arch Phys Med Rehabil 1974 ; 55: 74-80.

13.

Sheldon JH The effect of age on the control of sway. Gerontological Clinica 1963; 5: 129-38.

14.

Murray MP , Seireg AA , Sepic SB Normal postural stability and steadiness; Quantitative assessment. The J Bone Joint Surg [BR] 1975; 57A: 510-16.

15.

Era P. , Heikkinen E. Postural sway during standing and unexpected disturbance of balance in random samples of men of different ages. J Gerontol 1985; 40: 287-95.

16.

Brocklehurst JC , Robertson D. , James-Groom P. Clinical correlates of sway in old age - sensory modalities. Age Ageing 1982 11: 1-10.

17.

Fernie GR , Gryfe CI , Holliday PJ , Llewellyn A. The relationship of postural sway in standing to the incidence of falls in geriatric subjects. Age Ageing 1982; 11: 11-16.

18.

Lichtenstein MJ , Sheilds SL , Shiavi RG , Burger MC Clinical determinants of biomechanics platform measures of balance in aged women. J Amer Geriatr Soc 1988; 36: 996-1002.

19.

Ring C. , Nayak Usl , Isaacs B. Balance function in elderly people who have and have not fallen. Arch Phys Med Rehabil 1988; 69: 261-64.

20.

De Weerdt W. , Harrison M. , Smith P. , Hoodless D. , Pottage I. The Nottingham Balance Platform: A practical application of microcomputers in physiotherapy. Physiotherapy Practice 1988; 4: 9-17.

21.

Ring C. , Nayak Usl , Isaacs B. The effect of visual deprivation and proprioceptive change on postural sway in healthy adults. J Am Geriatr Soc 1989; 37: 745-49.

22.

Okubo J. , Watanabe I. , Takeya T. , Baron JB Influence of foot position and visual field condition in the examination for equilibrium function and sway of the center of gravity in normal persons. Agressologie 1979; 20: 127-32.

23.

Black FO , Wall C. , Nashner LM Effects of visual and support surface orientation references upon postural control in vestibular deficient subjects. Acta Otolaryngol 1983; 95: 199-210.

24.

Dornan J. , Fernie GR , Holliday PJ Visual input: Its importance in the control of sway. Arch Phys Med Rehabil 1978; 59: 586-91.

25.

Dickinson J. , Leonard JA The role of peripheral vision in static balance . Ergonomics 1967; 10: 421-29.

26.

Nashner LM , Black FO , Wall C. Adaptation to altered support and visual conditions during stance: patients with vestibular deficits. J Neurosci 1982; 2: 536-44.

27.

Aniansson A. , Gustafsson E. Physical training in elderly men with special reference to quadriceps muscle strength and morphology. Clin Physiol 1987; 1: 87-98.