The role of strength in rising from a chair in the functionally impaired elderly

Hughes, Michael; Myers, Barry S.; Schenkman, Margaret

doi:10.1016/s0021-9290(96)80001-7

Cited by 258 publications

(122 citation statements)

References 17 publications

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“…However, large demands are placed on the knee musculature when rising from a chair where up to 87% of available knee strength is used in older adults. 29,30 The poor weight-bearing ability when rising from a chair may be a result of the important concentric knee muscle component specific to this task, coupled with the very weak paretic knee musculature which has been reported previously in individuals with stroke. 31 In addition, rising from a chair is a dynamic task which requires that force be generated quickly which may be challenging as a reduced rate of force generation has been documented with the paretic muscles in individuals with stroke.…”

Section: Bilateral Weight-bearing Versus Single-limb Weight-shiftingmentioning

confidence: 92%

Reliability and comparison of weight-bearing ability during standing tasks for individuals with chronic stroke

Eng

Chu

2002

Archives of Physical Medicine and Rehabilitation

234

157

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Objectives-To determine the test-retest reliability over 2 separate days for weight-bearing ability during standing tasks in individuals with chronic stroke and to compare the weight-bearing ability among five standing tasks for the paretic and non-paretic limbs.Design-Prospective study using a convenient sample. Setting-Free-standing tertiary rehabilitation center.Participants-15 community-dwelling stroke individuals with moderate motor deficits; volunteer sample. Interventions-Not applicable.Main Outcome Measures-Weight-bearing ability as measured by the vertical ground reaction force during 5 standing tasks (rising from a chair, quiet standing, weight-shifting forward, backward, laterally).Results-The weight-bearing ability was less for the paretic limb compared with the nonparetic limb, but the intraclass correlation coefficients were high (0.95-0.99) for both limbs between the 2 sessions for all 5 tasks. The forward weight-shifting ability was particularly low in magnitude on the paretic side compared with the other weight-shifting tasks. In addition, the forward weightshift ability of the nonparetic limb was also impaired but to a lesser extent. Large asymmetry was evident when rising from a chair, with the paretic limb bearing a mean 296N and the nonparetic side bearing a mean 458N. The weight-bearing ability during all 5 tasks correlated with one another (r range, 0.56-0.94).Conclusions-Weight-bearing ability can be reliably measured and may serve as a useful outcome measure in individuals with stroke. We suggest that impairments of the hemiparetic side during forward weight shifting and sit-to-stand tasks presents a challenge to the motor systems of individuals with stroke, which may account for the poor balance that is often observed in these individuals.

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Section: Bilateral Weight-bearing Versus Single-limb Weight-shiftingmentioning

confidence: 92%

Reliability and comparison of weight-bearing ability during standing tasks for individuals with chronic stroke

Eng

Chu

2002

Archives of Physical Medicine and Rehabilitation

234

157

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“…Most published studies have mainly focused on function recovery after total knee arthroplasty (18,(27)(28)(29) or the effect of age on STS movement performance (20,21,26) . Jevsevar et al (18) found that patients after TKA had a smaller range of knee flexion and lower maximum flexion moments than healthy subjects.…”

Section: Discussionmentioning

confidence: 99%

Analysis of multiple waveforms by means of functional principal component analysis: normal versus pathological patterns in sit-to-stand movement

Epifanio

Ávila

Page

et al. 2008

Med Biol Eng Comput

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This paper presents an application of Functional Principal Component Analysis (FPCA) to describe inter-subject variability of multiple waveforms. This technique was applied to the study of sit-to-stand movement in two groups of people, osteoarthritic patients and healthy subjects.Although STS movement has not been much applied to the study of knee osteoarthritis, it can provide relevant information about the effect of osteoarthritis disease on knee joint function.Two waveforms, knee flexion angle and flexion moment, were simultaneously analysed. Instead of using the common multivariate approach we used the functional one, which allows working with continuous functions without neither discretization nor time scale normalization.The results show that time-scale normalization can alter the FPCA solution. Furthermore, FPCA presents a better discriminatory power compared to the classical multivariate approach. Then, this technique can be applied as a functional assessment tool, allowing the identification of relevant variables to discriminate heterogeneous groups, such as healthy and pathological subjects.

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“…Strength was tested in a seated-position with a hip angle of 90°and a knee flexion angle of 60° [12,21,30,32,40], relative to 0°a t full knee and hip extension (see Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

“…However, for maintaining dynamic stability, both flexors and extensors are essential and should be considered in measurements. Through the interaction of knee flexors and extensors, the center of gravity could be kept in the area of support, e.g., while standing up from a chair, walking, or in the recovery from stumbling; and falls could be avoided [7,9,12,20,24,30]. Studies regarding isometric strength of knee extensors often measured the dominant leg [4,9,21,25,32], or both legs individually [9,30].…”

Section: Introductionmentioning

confidence: 99%

Reliability and effects of muscular pretension on isometric strength of older adults

Morat

Preuß

2013

Eur Rev Aging Phys Act

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There were two objectives to this study: (a) to determine the reliability of measuring isometric maximum torque (MT) and maximum rate of torque development (MRTD) of the knee extensor and flexor muscles and (b) to assess the effects of different muscular pretensions on MT and MRTD of older adults. Maximum strength of 35 untrained healthy older adults (aged 66.9±6.6 years; height 1.72±0.07 m; weight 75.2±9.6 kg) was measured. Strength measurement was performed with the Dr. Wolff ISO Check using a piezo-electric force transducer. MT intra-day coefficient of variation (CV) was between 3.30 and 12.40 % for both measurement sessions. Intraclass correlation coefficients (ICC) ranging from 0.71 to 0.99 showed good relative reliability. MT test-retest reliability (between sessions 1 and 2) of knee extension reached a CV between 7.10 and 9.30 % and high ICC values. The measurement of the knee flexion achieved an acceptable CV (9.40 %) at 40 % muscular pretension. MRTD was negatively influenced by muscular pretension (p <0.05). In conclusion, MT could be measured reliably over different trials using isometric strength measurement. The test-retest reliability was acceptable at knee extension with 10 to 40 % muscular pretension and with 40 % muscular pretension at knee flexion. A higher muscular pretension has no impact on MT but decreases MRTD in older adults.

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The role of strength in rising from a chair in the functionally impaired elderly

Cited by 258 publications

References 17 publications

Reliability and comparison of weight-bearing ability during standing tasks for individuals with chronic stroke

Reliability and comparison of weight-bearing ability during standing tasks for individuals with chronic stroke

Analysis of multiple waveforms by means of functional principal component analysis: normal versus pathological patterns in sit-to-stand movement

Reliability and effects of muscular pretension on isometric strength of older adults

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