Reference Values for Concentric Knee Isokinetic Strength and Power in Nonathletic Men and Women from 20 to 80 Years Old

Neder, J. Alberto; Nery, Luíz Eduardo; Shinzato, Gilson Tanaka; Andrade, Marília Santos; Peres, Celeide Pinto Aguiar; Silva, Antônio C.

doi:10.2519/jospt.1999.29.2.116

Cited by 114 publications

(157 citation statements)

References 9 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…Moreover, the larger FFM should be responsible for larger absolute strength values in the quadriceps and hamstrings. 5,6 Absolute¯exion strength of the best knee, however, is comparable in both groups. But, when corrected for FFM, again extension strength is slightly (6 ± 7%), but signi®cantly lower in obese women compared to the lean and kneē exion strength is even up to 18 ± 20% lower.…”

Section: Isokinetic Knee Strengthmentioning

confidence: 88%

“…However, as muscle mass has been found to be the major determinant of the age and gender related differences in skeletal muscle strength in non-obese subjects, strength measures should be corrected for fat-free mass. 5,6 This has also been pointed out in studies using a handgrip dynamometer. 7,14,15 Strength comparisons between groups can be made by using simple ratio standards, that is strength measures divided by fat-free mass.…”

Section: Introductionmentioning

confidence: 89%

“…5 Thus, considering the transport of the larger body mass in obesity, the quadriceps muscle (but not the hamstrings) should be stronger due to a training effect of the weight bearing activities. Moreover, the larger FFM should be responsible for larger absolute strength values in the quadriceps and hamstrings.…”

Section: Isokinetic Knee Strengthmentioning

confidence: 99%

“…Furthermore, experimental groups should be controlled for height, as height has also been pointed out to be a determinant of handgrip 15 and isokinetic muscle strength. 5,22 To our knowledge, until now no studies have been performed controlling for all of these variables.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the lean and obese subjects should be matched for age and physical activity, as aging 5,15,21 and low levels of daily physical activity 4,5,15 tend to impair muscle strength. Furthermore, experimental groups should be controlled for height, as height has also been pointed out to be a determinant of handgrip 15 and isokinetic muscle strength.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

et al. 2001

View full text Add to dashboard Cite

OBJECTIVE: To investigate whether peripheral muscle strength is signi®cantly different between lean and obese women controlled for age and physical activity, using an allometric approach. DESIGN: Cross-sectional study of isometric handgrip and isokinetic leg and trunk muscle strength. SUBJECTS: 173 obese (age 39.9 AE 11.4 y, body mass index (BMI) 37.8 AE 5.3 kgam 2 ) and 80 lean (age 39.7 AE 12.2 y, BMI 22.0 AE 2.2 kgam 2 ) women. MEASUREMENTS: Anthropometric measures (weight, height) and body composition (bioelectrical impedance method), isometric handgrip (maximal voluntary contraction on the Jamar dynamometer), isokinetic trunk¯exion ± extension, trunk rotation, and knee¯exion ± extension (Cybex dynamometers). RESULTS: Absolute isokinetic strength output (that is, strength uncorrected for fat-free mass) was larger in obese compared to lean women, except for knee¯exion and isometric handgrip, which were not signi®cantly different (P b 0.05). Pearson correlation coef®cients between strength measures and fat-free mass (kg) were low to moderate both in lean (r 0.28 ± 0.53, P`0.05) and in obese (r 0.29 ± 0.49, P`0.001) women. There was no correlation with fat mass (kg) in the lean, whereas in the obese women a weak positive relation could be observed for most isokinetic data (r 0.21 ± 0.39, P`0.01). When correcting for fat-free mass (raised to the optimal exponent determined by allometric scaling), all strength measurements were at least 6% lower in obese when compared to the lean women, except for trunk¯exion, which was at least 8% stronger in obese women. DISCUSSION: The higher absolute knee extension strength measures of leg and the similar extension strength of the trunk in the obese sample compared to the lean might be explained by the training effect of weight bearing and support of a larger body mass. However when the independent effect of fat-free mass is removed, these strength measures, as well as oblique abdominal muscle and handgrip strength, turned out to be lower in obese women. These observations could be the re¯ection of the overall impairment of physical ®tness as a consequence of obesity and its metabolic complications.

show abstract

Section: Isokinetic Knee Strengthmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 89%

Section: Isokinetic Knee Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

et al. 2001

View full text Add to dashboard Cite

show abstract

Musculoskeletal Disorders in Obesity

O’Malley¹

2011

Exercise Therapy in the Management of Musculoskeletal Disorders

View full text Add to dashboard Cite

Exercise and Osteoarthritis: Cause and Effects

Bennell

Hinman

Wrigley

et al. 2011

Comprehensive Physiology

View full text Add to dashboard Cite

Osteoarthritis (OA) is a common chronic joint condition predominantly affecting the knee, hip, and hand joints. Exercise plays a role in the development and treatment of OA but most of the literature in this area relates to knee OA. While studies indicate that exercise and physical activity have a generally positive effect on healthy cartilage metrics, depending upon the type of the activity and its intensity, the risk of OA development does appear to be moderately increased with sporting participation. In particular, joint injury associated with sports participation may be largely responsible for this increased risk of OA with sport. Various repetitive occupational tasks are also linked to greater likelihood of OA development. There are a number of physical impairments associated with OA including pain, muscle weakness and altered muscle function, reduced proprioception and postural control, joint instability, restricted range of motion, and lower aerobic fitness. These can result directly from the OA pathological process and/or indirectly as a result of factors such as pain, effusion, and reduced activity levels. These impairments and their underlying physiology are often targeted by exercise interventions and evidence generally shows that many of these can be modified by specific exercise. There is currently little clinical trial evidence to show that exercise can alter mechanical load and structural disease progression in those with established OA, although a number of impairments, that are amenable to change with exercise, appears to be associated with increased mechanical load and/or disease progression in longitudinal studies.

show abstract

Reference Values for Concentric Knee Isokinetic Strength and Power in Nonathletic Men and Women from 20 to 80 Years Old

Cited by 114 publications

References 9 publications

Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

Musculoskeletal Disorders in Obesity

Exercise and Osteoarthritis: Cause and Effects

Contact Info

Product

Resources

About