The Effects Of Rest Interval On Quadriceps Torque During An Isokinetic Testing Protocol In Elderly

Bottaro, Martim; Russo, André Faria; Oliveira, Ricardo Jacó de

doi:10.1249/00005768-200505001-01358

Cited by 63 publications

(62 citation statements)

References 18 publications

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“…Equipment positioning for each participant was recorded to ensure consistent conditions for the re-assessment measurements. After a warm-up involving two sub-maximal sets of 10 repetitions, the testing protocol consisted of two sets of four maximal contractions at 60°/s (PT60) and two sets of four maximal contractions at 180°/s (PT180), with 1-min rest intervals between sets (Bottaro et al 2005). Participants were asked to perform contractions with maximum effort, and verbal encouragement was provided during the test.…”

Section: Static and Dynamic Balancementioning

confidence: 99%

Balance Exercises Circuit improves muscle strength, balance, and functional performance in older women

Avelar

Costa

Safons

et al. 2016

AGE

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This study introduces the Balance Exercises Circuit (BEC) and examines its effects on muscle strength and power, balance, and functional performance in older women. Thirty-five women aged 60+ (mean age = 69.31, SD = 7.35) were assigned to either a balance exercises group (BG, n = 14) that underwent 50-min sessions twice weekly, of a 12-week BEC program, or a wait-list control group (CG, n = 21). Outcome measures were knee extensor peak torque (PT), rate of force development (RFD), balance, Timed Up & Go (TUG), 30-s chair stand, and 6-min walk tests, assessed at baseline and 12 weeks. Twenty-three participants completed follow-up assessments. Mixed analysis of variance models examined differences in outcomes. The BG displayed improvements in all measures at follow-up and significantly improved compared with CG on, isokinetic PT60, PT180 (p = 0.02), RFD (p < 0.05), balance with eyes closed (p values range .02 to <.01) and TUG (p = 0.03), all with medium effect sizes. No changes in outcome measures were observed in the CG. BEC improved strength, power, balance, and functionality in older women. The BEC warrants further investigation as a fall prevention intervention.

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Section: Static and Dynamic Balancementioning

confidence: 99%

Balance Exercises Circuit improves muscle strength, balance, and functional performance in older women

Avelar

Costa

Safons

et al. 2016

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“…Pincivero et al (1997;1998) e Touey et al (1994 também reportaram que intervalos de recuperação de 30 e 60s não possibilitaram uma completa recuperação do PT e do TT do quadríceps em protocolos de treinamento isocinético em homens jovens. Porém, Bottaro et al (2005) ao avaliar a extensão isocinética de joelho em idosos a 60 e 120°/s e Parcell et al (2002) ao estudar homens jovens avaliados com velocidades 60 e 180°/s, mostraram que 30 e 60s, respectivamente, foram suficientes para recuperar o PT entre séries. Bottaro et al (2005) também não verificaram redução significativa entre no torque médio durante o teste com idosos.…”

Section: Discussionunclassified

“…Porém, Bottaro et al (2005) ao avaliar a extensão isocinética de joelho em idosos a 60 e 120°/s e Parcell et al (2002) ao estudar homens jovens avaliados com velocidades 60 e 180°/s, mostraram que 30 e 60s, respectivamente, foram suficientes para recuperar o PT entre séries. Bottaro et al (2005) também não verificaram redução significativa entre no torque médio durante o teste com idosos. No entanto, cabe ressaltar que esses estudos utilizaram um protocolo com um volume de trabalho (i.e.…”

Section: Discussionunclassified

Fadiga muscular entre séries de exercícios isocinéticos em mulheres jovens

Celes

Pereira

Schwartz

et al. 2013

Motriz: rev. educ. fis.

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Resumo: OBJETIVO: Avaliar o efeito de dois Intervalos de Recuperação (IR) no pico de torque (PT) e no trabalho total (TT) isocinético em mulheres jovens. MÉTODOS: 17 mulheres, destreinadas, (27,2 ± 4,1 anos; 56,8 ± 6,9 kg; 162,6 ± 7,0 cm) realizaram três séries de 10 extensões isocinéticas do joelho a 60° e 180°/s, com um e dois minutos de IR. A análise estatística foi a ANOVA dois x três [IR (um e dois minutos) x série (1ª, 2ª e 3ª)] com α < 0.05. RESULTADOS: Um minuto de IR não foi suficiente para manter o PT e o TT ao longo das séries (p<0,05) a 60º (redução de 15,7% no PT e 19,8% no TT) e 180º/s (redução de 3,6% no PT e de 5,6% no TT). Dois minutos foram suficientes apenas a 180º/s. Contudo, a 60°/s, dois minutos de IR possibilitou um maior PT na segunda e na terceira série em relação a um minuto (p<0,05). CONCLUSÃO: Dois minutos são suficientes para manutenção do PT em um protocolo de treinamento isocinético a 180º/s, mas não a 60º/s em mulheres jovens. Palavras-chave: Torque. Fadiga muscular. Extensão de joelho. Isocinético. Muscle fatigue between isokinetic exercises sets in young womenAbstract: OBJECTIVE: To examine the effect of two rest interval (RI) on isokinetic Peak Torque (PT) and total work (TW) produced by young women. METHODS: 17 untrained women (27.2 ± 4.1 yrs; 56.8 ± 6.9 kg; 162.6 ± 7.0 cm) performed three sets of 10 unilateral isokinetic knee extension repetitions at 60° and 180°/s with one and two minutes of RI. Statistical evaluation was performed using a two x three ANOVA [RI (one and two minutes) x set (1 st , 2 nd , 3rd )] with α < 0.05. RESULTS: One minute was not enough to keep PT and TW between sets (p<0.05) at 60º (reduction of 15.7% in PT and 19.8% in TW) and 180º/s (reduction of 3.6% in PT and 5.6% in TT). Two minutes was enough only at 180º/s. However, two minutes of RI was greater (p<0.05) than one minutes at 60°/s for PT during the 2 nd and 3 rd sets. CONCLUSION: Two minutes is sufficient to keep PT within typical isokinetic resistance training protocols at 180º/s, but not at 60º/s in young women.

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“…Fastened Velcro belts were used on the trunk, pelvis, and thigh to avoid compensatory movements. The protocol consisted of three sets of four concentric muscle contractions (60°/s) with 30-s rest intervals between sets (Bottaro et al 2005). The recorded value for analysis was the highest peak torque (PT) of the three series, which was expressed in absolute values (in normal meter) and relative to body mass (in normal meter per kilogram).…”

Section: Isokinetic Muscle Peak Torquementioning

confidence: 99%

Association between polymorphisms in the TRHR gene, fat-free mass, and muscle strength in older women

Lunardi

Lima

Pereira

et al. 2013

AGE

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A previous genome-wide association study suggested that polymorphisms in the thyrotrophinreleasing hormone receptor (TRHR) gene contribute to fat-free mass (FFM) variation. The aim of the present study was to examine the association between polymorphisms in the TRHR gene with FFM and muscle strength in older women. Volunteers (n =241; age=66.65± 5.5 years) underwent quadriceps strength assessment using isokinetics and fat-free mass by dual-energy Xray absorptiometry. TRHR polymorphisms and ancestryinformative markers were genotyped through standard procedures. No significant difference was observed for rs7832552. Regarding the rs16892496, ANCOVA revealed that appendicular fat-free mass (AFFM) and relative AFFM were significantly different between groups (p=0.04 and p=0.05, respectively). Individuals carrying A/A and A/C genotypes respectively showed, on average, an extra 1 kg and 900 g of AFFM when compared to C/C genotype carriers. Also, the C/C genotype group presented a significantly higher chance to have reduced muscle strength. The observations presented here provide further evidence that the rs16892496 polymorphism in the TRHR gene may play a role in FFM variation. Moreover, the results bring the novel insight that this genetic variant can present a modest contribution to muscle strength in older women.

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The Effects Of Rest Interval On Quadriceps Torque During An Isokinetic Testing Protocol In Elderly

Cited by 63 publications

References 18 publications

Balance Exercises Circuit improves muscle strength, balance, and functional performance in older women

Balance Exercises Circuit improves muscle strength, balance, and functional performance in older women

Fadiga muscular entre séries de exercícios isocinéticos em mulheres jovens

Association between polymorphisms in the TRHR gene, fat-free mass, and muscle strength in older women

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