Isokinetic Leg Muscle Strength in Older Americans and Its Relationship to a Standardized Walk Test: Data from the National Health and Nutrition Examination Survey 1999–2000

Ostchega, Yechiam; Dillon, Charles; Lindle, R. S.; Carroll, Margaret D.; Hurley, Ben F.

doi:10.1111/j.1532-5415.2004.52268.x

Cited by 79 publications

(67 citation statements)

References 34 publications

(61 reference statements)

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“…Specific to the knee extensors, our results were inconsistent with those of many (11,14,(31)(32)(33), although not all (34,35) prior studies. However, this disparity in results is probably explained by the difference in performance on the gait speed test.…”

Section: Discussioncontrasting

confidence: 57%

Association of physical performance with muscle strength and hip range of motion in hip osteoarthritis

Pua

Wrigley

Collins

et al. 2009

Arthritis & Rheumatism

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Objective. To examine whether the associations of physical performance with isometric hip and knee extensors strength and passive hip flexion and internal rotation range of motion (ROM) are nonlinear in community-dwelling adults with hip osteoarthritis (OA). Methods. Participants were 100 adults (mean age 62 years) with radiographically confirmed hip OA. Physical performance measures included gait speed test and timed stair tests. Piecewise regression models of muscle strength and hip ROM on physical performance measures were used to identify possible breakpoints. Receiver operating characteristic (ROC) curve analysis was used to identify participants with functionally inadequate (<1.0 meters/second) gait speed and optimal cut points were identified. Results. Muscle strength and hip ROM were nonlinearly associated with stair measures but not with gait speed measures. The optimal breakpoints and ROC-derived cut points were 1.8 -2.5Nm/kg for knee extensors, 1.5-2.1Nm/kg for hip extensors, 25-26°for hip internal rotation ROM, and 109 -115°for hip flexion ROM. Muscle strength breakpoints increased monotonically with increasing movement demand. Conclusion. In individuals with hip OA, the associations between physical performance and measures of muscle strength and hip ROM are less straightforward than previously assumed. These breakpoints and ROC-derived cut points may be useful in identifying individuals for whom interventions that improve muscle strength or hip ROM would be most beneficial.

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Section: Discussioncontrasting

confidence: 57%

Association of physical performance with muscle strength and hip range of motion in hip osteoarthritis

Pua

Wrigley

Collins

et al. 2009

Arthritis & Rheumatism

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“…One such source is the psychological status related to exercise capacity in healthy subjects and in patients with pulmonary disease (3). Other potential sources are differences in peripheral muscle conditioning (4,31) and in pulmonary function (29). However, these variables are not as easily assessed as are demographic and anthropometric attributes, since dynamometers and spirometers are necessary to quantify muscle and pulmonary function, respectively.…”

Section: Discussionmentioning

confidence: 99%

The six-minute walk test and body weight-walk distance product in healthy Brazilian subjects

Iwama

Andrade

Shima

et al. 2009

Braz J Med Biol Res

205

212

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We assessed the 6-min walk distance (6MWD) and body weight x distance product (6MWw) in healthy Brazilian subjects and compared measured 6MWD with values predicted in five reference equations developed for other populations. Anthropometry, spirometry, reported physical activity, and two walk tests in a 30-m corridor were evaluated in 134 subjects (73 females, 13-84 years). Mean 6MWD and 6MWw were significantly greater in males than in females (622 ± 80 m, 46,322 ± 10,539 kg . m vs 551 ± 71 m, 36,356 ± 8,289 kg . m, P < 0.05). Four equations significantly overestimated measured 6MWD (range, 32 ± 71 to 137 ± 74 m; P < 0.001), and one significantly underestimated it (-36 ± 86 m; P < 0.001). 6MWD significantly correlated with age (r = -0.39), height (r = 0.44), body mass index (r = -0.24), and reported physical activity (r = 0.25). 6MWw significantly correlated with age (r = -0.21), height (r = 0.66) and reported physical activity (r = 0.25). The reference equation devised for walk distance was 6MWD m = 622.461 -(1.846 x Age years ) + (61.503 x Gender males = 1; females = 0 ); r 2 = 0.300. In an additional group of 85 subjects prospectively studied, the difference between measured and the 6MWD predicted with the equation proposed here was not significant (-3 ± 68 m; P = 0.938). The measured 6MWD represented 99.6 ± 11.9% of the predicted value. We conclude that 6MWD and 6MWw variances were adequately explained by demographic and anthropometric attributes. This reference equation is probably most appropriate for evaluating the exercise capacity of Brazilian patients with chronic diseases.

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“…2,3 The aging process results in decreased muscle function, 4,5 which has been associated with an increased risk of falls, 6,7 leading to impairments in daily activities. 7,8 In PAD patients, aside from the effects of aging, lower-extremity strength deficits are associated with walking impairment, 9 reduced physical functioning, poor capacity for walking faster, and reduced stair-climbing ability. 3 Muscle function, which is related to physical function and functional disability in subjects with different clinical conditions, has been accurately assessed with isokinetic dynamometers.…”

Section: Introductionmentioning

confidence: 99%

“…3 Muscle function, which is related to physical function and functional disability in subjects with different clinical conditions, has been accurately assessed with isokinetic dynamometers. 7,10,11 In PAD patients, isokinetic evaluation has also been used, 12e14 and the available evidence indicates that PAD patients present lower isokinetic strength and endurance in distal muscles compared with age-matched control subjects. 12e14 However, whether PAD affects muscle function in the proximal muscles of the lower limbs remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Isokinetic Strength and Endurance in Proximal and Distal Muscles in Patients With Peripheral Artery Disease

Câmara

Ritti‐Dias

Menêses

et al. 2012

Annals of Vascular Surgery

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Isokinetic Leg Muscle Strength in Older Americans and Its Relationship to a Standardized Walk Test: Data from the National Health and Nutrition Examination Survey 1999–2000

Abstract: Knee extensor muscle strength is affected by age and sex but not by race/ethnicity and it is significantly associated with timed walk.

Cited by 79 publications

References 34 publications

Association of physical performance with muscle strength and hip range of motion in hip osteoarthritis

Association of physical performance with muscle strength and hip range of motion in hip osteoarthritis

The six-minute walk test and body weight-walk distance product in healthy Brazilian subjects

Isokinetic Strength and Endurance in Proximal and Distal Muscles in Patients With Peripheral Artery Disease

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