Strength characterization of knee flexor and extensor muscles in Prader-Willi and obese patients

Capodaglio, Paolo; Vismara, Luca; Menegoni, Francesco; Baccalaro, G.; Galli, Manuela; Grugni, Graziano

doi:10.1186/1471-2474-10-47

Cited by 66 publications

(75 citation statements)

References 37 publications

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“…Individuals who are obese exhibit altered lower limb strength compared with healthy weight individuals 14–18. Lower limb strength can be characterized in terms of absolute strength and relative strength.…”

Section: Introductionmentioning

confidence: 99%

Relative Strength at the Hip, Knee, and Ankle Is Lower Among Younger and Older Females Who Are Obese

Koushyar

Nussbaum

Davy

et al. 2017

Journal of Geriatric Physical Therapy

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Background and Purpose:The mobility of individuals who are obese can be limited compared with their healthy weight counterparts. Lower limb strength has been associated with mobility, and reduced strength may contribute to mobility limitation among individuals who are obese. However, our understanding of the effects of obesity on lower limb strength is limited. The purpose of this study was to investigate the effects of obesity and age on extension and flexion strength at the hip, knee, and ankle.Methods:Using a cross-sectional design, 10 younger (18-30 years) healthy weight (body mass index = 18-24.9 kg/m2), 10 younger obese (body mass index >30 kg/m2), 10 older (65-80 years) healthy weight, and 10 older obese female participants performed isokinetic maximum voluntary contractions in ankle plantar flexion (PF), ankle dorsiflexion (DF), knee extension (KE), knee flexion (KF), hip extension (HE), and hip flexion (HF).Results and Discussion:Absolute strength among obese participants was 29% higher in DF (P = .002), 27% higher in KE (P = .004), and 23% higher in HF (P = .001), compared with healthy weight participants. Strength relative to body mass among obese participants was 31% lower in PF (P < .001), 14% lower in DF (P = .042), 16% lower in KE (P = .015), 27% lower in KF (P < .001), 29% lower in HE (P < .001), and 19% lower in HF (P = .001).Conclusions:Obese females exhibited lower relative strength at the ankle and hip, similar to the lower relative strength exhibited at the knee. Obese females also exhibited higher absolute strength, but only for 3 of 6 lower limb exertions investigated. This lack of uniformity across the 6 exertions is likely due to the still unclear underlying biomechanical mechanism responsible for these strength differences, which may also be influenced by aging. The effects of obesity on lower limb strength were also generally consistent between the 2 age groups investigated.

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Section: Introductionmentioning

confidence: 99%

Relative Strength at the Hip, Knee, and Ankle Is Lower Among Younger and Older Females Who Are Obese

Koushyar

Nussbaum

Davy

et al. 2017

Journal of Geriatric Physical Therapy

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“…Specifically, the higher absolute muscle strength of obese individuals could be more relevant for larger muscle groups involved in lifting and/or moving the body (i.e., knee and trunk extensors). Whilst some studies found higher absolute isokinetic/isometric strength of knee/trunk extensors in obese subjects [7,9], others have reported no significant difference in maximal isokinetic torque of knee/elbow flexors between obese and nonobese people [7,9,15]. Thus, the extra-load associated with severe The reference angle for isometric measurements was taken as 0°= full extension Isokinetic torque was measured in all studies as the peak torque produced during the concentric action obesity could act as a chronic training stimulus generating favorable muscle adaptations.…”

Section: Impact Of Obesity On Muscle Strengthmentioning

confidence: 99%

The Impact of Obesity on In Vivo Human Skeletal Muscle Function

et al. 2013

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Despite the considerable efforts that have been made to characterize in vivo human skeletal muscle function in the last 20 years, there is still controversy about whether obesity affects muscle performance in people of different ages. We therefore reviewed the available literature to determine the impact of obesity on skeletal muscle strength and fatigue. Obese individuals have (i) higher absolute muscle strength, (ii) lower strength per unit body mass, (iii) a similar strength to total fat-free mass ratio and (iv) a similar/higher strength to muscle size ratio compared to their nonobese peers. These results suggest that obesity does not negatively affect the intrinsic muscle contractile properties. Moreover, the available evidence does not show differences in muscle fatigue between obese and nonobese individuals. Therefore, factors such as the handicapping effect of excess fat mass and/or impaired motor coordination may account for the poor physical performance of obese people of all ages.

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“…Comparando-se o pico de toque em pacientes de diferentes idades, observou-se que os valores da força para os extensores do joelho eram, na média geral, a metade do valor encontrado para os extensores. (CAPODAGLIO; PAOLO et al, 2008).…”

Section: Discussão Dos Resultadosunclassified

Avaliação da força muscular de flexores e extensores de joelho em indivíduos idosos socialmente ativos

Wibelinger¹,

Schneider²,

Tonial³

et al. 2009

Rev. Bras. de Ciên. do Envelh. Hum.

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ResumoO envelhecimento traz consigo várias manifestações fisiológicas, dentre as quais a perda de força muscular, assim como da habilidade do músculo para exercer força rapidamente. A partir dos sessenta anos de idade esta perda se torna mais severa e é responsável por limitações na funcionalidade, déficits de equilíbrio e risco de quedas. Esta pesquisa teve como objetivo avaliar a força muscular (torque muscular) de flexores e extensores de joelho em indivíduos idosos socialmente ativos.

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Strength characterization of knee flexor and extensor muscles in Prader-Willi and obese patients

Cited by 66 publications

References 37 publications

Relative Strength at the Hip, Knee, and Ankle Is Lower Among Younger and Older Females Who Are Obese

Relative Strength at the Hip, Knee, and Ankle Is Lower Among Younger and Older Females Who Are Obese

The Impact of Obesity on In Vivo Human Skeletal Muscle Function

Avaliação da força muscular de flexores e extensores de joelho em indivíduos idosos socialmente ativos

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