Alterations in gait speed and age do not fully explain the changes in gait mechanics associated with healthy older women
Highlights ► Regression statistics assessed the variance in gait attributable to speed and age. ► Annual losses of 1.2%/year in natural gait speed were predicted by age in older women. ► Yearly declines in foot clearance may contribute to the rising fall risk with age. ► A proximal shift in mechanic...
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| Published in: | Gait & posture Vol. 37; no. 4; pp. 586 - 592 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
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Elsevier B.V
01-04-2013
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| Abstract | Highlights ► Regression statistics assessed the variance in gait attributable to speed and age. ► Annual losses of 1.2%/year in natural gait speed were predicted by age in older women. ► Yearly declines in foot clearance may contribute to the rising fall risk with age. ► A proximal shift in mechanical demands from the ankle to hip was observed pre-swing. ► Exercise interventions for older women should improve/retain hip and ankle function. |
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| AbstractList | Older adults exhibit modified gait patterns compared to the young, adopting movement strategies in response to changes in musculoskeletal function. Investigating the functional mobility of older women is particularly important because of their increased life expectancy and greater falls risk compared to men. We explored the relationships between gait parameters and age in healthy older women whilst accounting for declining gait speeds. Kinematic and kinetic data were collected from thirty-nine women (60a83 years) whilst walking at a comfortable cadence. Regression analysis assessed the capacity of gait speed and age to explain the variance in gait associated with older age. Speed explained the majority of variance in many gait parameters. By including age in the regression, the total explained variance (R2) for foot clearance (70%), ankle plantarflexion angle (30%), peak ankle plantarflexor moment (58%), and hip power generation (56%) were significantly (p < 0.05) greater than for speed alone. Nonetheless, changes in speed and age did not fully explain the variance in gait mechanics associated with older age and other contributing factors must exist. Losses of 1.2%/year in gait speed were predicted by age, exceeding previous predictions of -0.7%/year. Furthermore, the accumulation of apparently small decreases of 0.2 cm/year in peak foot-to-ground clearance has clinical implications and offers insight into the mechanisms by which gait becomes hazardous in older age. Older adults exhibit modified gait patterns compared to the young, adopting movement strategies in response to changes in musculoskeletal function. Investigating the functional mobility of older women is particularly important because of their increased life expectancy and greater falls risk compared to men. We explored the relationships between gait parameters and age in healthy older women whilst accounting for declining gait speeds. Kinematic and kinetic data were collected from thirty-nine women (60-83 years) whilst walking at a comfortable cadence. Regression analysis assessed the capacity of gait speed and age to explain the variance in gait associated with older age. Speed explained the majority of variance in many gait parameters. By including age in the regression, the total explained variance (R2) for foot clearance (70%), ankle plantarflexion angle (30%), peak ankle plantarflexor moment (58%), and hip power generation (56%) were significantly (p<0.05) greater than for speed alone. Nonetheless, changes in speed and age did not fully explain the variance in gait mechanics associated with older age and other contributing factors must exist. Losses of 1.2%/year in gait speed were predicted by age, exceeding previous predictions of -0.7%/year. Furthermore, the accumulation of apparently small decreases of 0.2 cm/year in peak foot-to-ground clearance has clinical implications and offers insight into the mechanisms by which gait becomes hazardous in older age. Older adults exhibit modified gait patterns compared to the young, adopting movement strategies in response to changes in musculoskeletal function. Investigating the functional mobility of older women is particularly important because of their increased life expectancy and greater falls risk compared to men. We explored the relationships between gait parameters and age in healthy older women whilst accounting for declining gait speeds. Kinematic and kinetic data were collected from thirty-nine women (60a83 years) whilst walking at a comfortable cadence. Regression analysis assessed the capacity of gait speed and age to explain the variance in gait associated with older age. Speed explained the majority of variance in many gait parameters. By including age in the regression, the total explained variance (R2) for foot clearance (70%), ankle plantarflexion angle (30%), peak ankle plantarflexor moment (58%), and hip power generation (56%) were significantly (p < 0.05) greater than for speed alone. Nonetheless, changes in speed and age did not fully explain the variance in gait mechanics associated with older age and other contributing factors must exist. Losses of 1.2%/year in gait speed were predicted by age, exceeding previous predictions of a0.7%/year. Furthermore, the accumulation of apparently small decreases of 0.2 cm/year in peak foot-to-ground clearance has clinical implications and offers insight into the mechanisms by which gait becomes hazardous in older age. Highlights ► Regression statistics assessed the variance in gait attributable to speed and age. ► Annual losses of 1.2%/year in natural gait speed were predicted by age in older women. ► Yearly declines in foot clearance may contribute to the rising fall risk with age. ► A proximal shift in mechanical demands from the ankle to hip was observed pre-swing. ► Exercise interventions for older women should improve/retain hip and ankle function. ► Regression statistics assessed the variance in gait attributable to speed and age. ► Annual losses of 1.2%/year in natural gait speed were predicted by age in older women. ► Yearly declines in foot clearance may contribute to the rising fall risk with age. ► A proximal shift in mechanical demands from the ankle to hip was observed pre-swing. ► Exercise interventions for older women should improve/retain hip and ankle function. Older adults exhibit modified gait patterns compared to the young, adopting movement strategies in response to changes in musculoskeletal function. Investigating the functional mobility of older women is particularly important because of their increased life expectancy and greater falls risk compared to men. We explored the relationships between gait parameters and age in healthy older women whilst accounting for declining gait speeds. Kinematic and kinetic data were collected from thirty-nine women (60–83 years) whilst walking at a comfortable cadence. Regression analysis assessed the capacity of gait speed and age to explain the variance in gait associated with older age. Speed explained the majority of variance in many gait parameters. By including age in the regression, the total explained variance (R2) for foot clearance (70%), ankle plantarflexion angle (30%), peak ankle plantarflexor moment (58%), and hip power generation (56%) were significantly (p<0.05) greater than for speed alone. Nonetheless, changes in speed and age did not fully explain the variance in gait mechanics associated with older age and other contributing factors must exist. Losses of 1.2%/year in gait speed were predicted by age, exceeding previous predictions of −0.7%/year. Furthermore, the accumulation of apparently small decreases of 0.2cm/year in peak foot-to-ground clearance has clinical implications and offers insight into the mechanisms by which gait becomes hazardous in older age. Older adults exhibit modified gait patterns compared to the young, adopting movement strategies in response to changes in musculoskeletal function. Investigating the functional mobility of older women is particularly important because of their increased life expectancy and greater falls risk compared to men. We explored the relationships between gait parameters and age in healthy older women whilst accounting for declining gait speeds. Kinematic and kinetic data were collected from thirty-nine women (60-83 years) whilst walking at a comfortable cadence. Regression analysis assessed the capacity of gait speed and age to explain the variance in gait associated with older age. Speed explained the majority of variance in many gait parameters. By including age in the regression, the total explained variance (R2) for foot clearance (70%), ankle plantarflexion angle (30%), peak ankle plantarflexor moment (58%), and hip power generation (56%) were significantly (p<0.05) greater than for speed alone. Nonetheless, changes in speed and age did not fully explain the variance in gait mechanics associated with older age and other contributing factors must exist. Losses of 1.2%/year in gait speed were predicted by age, exceeding previous predictions of -0.7%/year. Furthermore, the accumulation of apparently small decreases of 0.2 cm/year in peak foot-to-ground clearance has clinical implications and offers insight into the mechanisms by which gait becomes hazardous in older age. |
| Author | Vanicek, N O’Brien, T.D Alcock, L |
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| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/23122897$$D View this record in MEDLINE/PubMed |
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| Snippet | Highlights ► Regression statistics assessed the variance in gait attributable to speed and age. ► Annual losses of 1.2%/year in natural gait speed were... ► Regression statistics assessed the variance in gait attributable to speed and age. ► Annual losses of 1.2%/year in natural gait speed were predicted by age... Older adults exhibit modified gait patterns compared to the young, adopting movement strategies in response to changes in musculoskeletal function.... |
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| SubjectTerms | Accidental Falls Adaptation, Physiological - physiology Aged Aged, 80 and over Aging - physiology Ankle Joint Ankles Biomechanical Phenomena Female Gait - physiology Gait mechanics Healthy ageing Humans Middle Aged Orthopedics Range of Motion, Articular - physiology Regression Analysis Speed |
| Title | Alterations in gait speed and age do not fully explain the changes in gait mechanics associated with healthy older women |
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