Balance disorder and increased risk of falls in osteoporosis and kyphosis: Significance of kyphotic posture and muscle strength

Mehrsheed Sinaki, Robert H. Brey, Christine A. Hughes, Dirk R. Larson, Kenton R Kaufman

Research output: Contribution to journalArticle

223 Citations (Scopus)

Abstract

This controlled trial was designed to investigate the influence of osteoporosis-related kyphosis (O-K) on falls. Twelve community-dwelling women with O-K (Cobb angle, 50-65°measured from spine radiographs) and 13 healthy women serving as controls were enrolled. Mean age of the O-K group was 76 years (±5.1), height 158 cm (±5), and weight 61 kg (±7.9), and mean age of the control group was 71 years (±4.6), height 161 cm (±3.8), and weight 66 kg (±11.7). Quantitative isometric strength data were collected. Gait was monitored during unobstructed level walking and during stepping over an obstacle of four different heights randomly assigned (2.5%, 5%, 10%, and 15% of the subject's height). Balance was objectively assessed with computerized dynamic posturography consisting of the sensory organization test. Back extensor strength, grip strength, and all lower extremity muscle groups were significantly weaker in the O-K group than the control group ( P <0.05), except right ankle plantar flexors ( P =0.09). There was a significant difference in the anteroposterior and mediolateral displacements and velocities. The O-K subjects had less anteroposterior displacement, greater mediolateral displacement, reduced anteroposterior velocity, and increased mediolateral velocity compared with controls for all conditions of unobstructed and obstructed level walking. Obstacle height had a significant effect on all center-of-mass variables. The O-K subjects had significantly greater balance abnormalities on computerized dynamic posturography than the control group ( P =0.002). Data show that thoracic hyperkyphosis on a background of reduced muscle strength plays an important role in increasing body sway, gait unsteadiness, and risk of falls in osteoporosis.

Original languageEnglish (US)
Pages (from-to)1004-1010
Number of pages7
JournalOsteoporosis International
Volume16
Issue number8
DOIs
StatePublished - Jul 2005

Fingerprint

Kyphosis
Muscle Strength
Posture
Osteoporosis
Gait
Control Groups
Walking
Independent Living
Weights and Measures
Hand Strength
Ankle
Lower Extremity
Spine
Thorax
Age Groups
Muscles

Keywords

  • Balance
  • Gait
  • Kyphosis
  • Muscle strength
  • Osteoporosis
  • Risk of fall

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Balance disorder and increased risk of falls in osteoporosis and kyphosis : Significance of kyphotic posture and muscle strength. / Sinaki, Mehrsheed; Brey, Robert H.; Hughes, Christine A.; Larson, Dirk R.; Kaufman, Kenton R.

In: Osteoporosis International, Vol. 16, No. 8, 07.2005, p. 1004-1010.

Research output: Contribution to journalArticle

Sinaki, Mehrsheed ; Brey, Robert H. ; Hughes, Christine A. ; Larson, Dirk R. ; Kaufman, Kenton R. / Balance disorder and increased risk of falls in osteoporosis and kyphosis : Significance of kyphotic posture and muscle strength. In: Osteoporosis International. 2005 ; Vol. 16, No. 8. pp. 1004-1010.
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