The effects of motor learning on clinical isokinetic performance of postmenopausal women

Brech, Guilherme Carlos; Ciolac, Emmanuel Gomes; Secchi, Leonardo Luiz Barretti; Alonso, Angélica Castilho; Greve, Júlia Maria D’Andréa

doi:10.1016/j.maturitas.2011.09.004

Cited by 25 publications

(32 citation statements)

References 23 publications

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“…Subsequently, two series of five maximal repetitions of knee extension and flexion were performed, starting with the dominant limb, with 60-second intervals between the series. Values from the second series were used to analyze the effects of motor learning on clinical isokinetic performance 16. Constant, standardized verbal encouragement was provided during the tests to promote maximum effort during contractions.…”

Section: Methodsmentioning

confidence: 99%

Serum 25-hydroxyvitamin D levels are associated with functional capacity but not with postural balance in osteoporotic postmenopausal women

Brech¹,

Ciolac²,

Peterson³

et al. 2017

Clinics

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OBJECTIVES:In post-menopausal women with osteoporosis, insufficient vitamin D levels decrease calcium fixation in the bones and calcium transport in the sarcoplasmic reticulum, which impairs muscle strength, possibly leading to detrimental consequences for the preservation of functional capacity and postural balance, fall prevention, and fracture risk. The aim of this study was to evaluate the association between vitamin D levels and knee muscle strength, postural balance and functional mobility among postmenopausal women with osteoporosis.METHODS:This cross-sectional study included 63 osteoporotic older women (aged 60.6±3.1 years). The subjects completed the Timed Up and Go Test to measure functional mobility, and postural balance was assessed on the AccuSway Plus portable force platform. Maximal strength was tested using an isokinetic dynamometer for knee flexion and extension. The subjects were assessed as a group and were divided into quartiles according to their vitamin D levels. Clinicaltrials.gov: NCT02771834.RESULTS:Vitamin D status was independently associated with the normalized peak torque of the knee extensors (β=0.59; p=0.04) and Timed Up and Go Test (β=-0.07; p<0.001). No between-group differences were observed in the demographic and clinical variables or postural balance; however, significant differences were observed in the Timed Up and Go Test, and the group with the highest vitamin D levels exhibited better performance than the group with the lowest vitamin D levels (p<0.001).CONCLUSION:The serum vitamin D levels were independently associated with normalized knee extension strength and functional mobility in postmenopausal women with osteoporosis.

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Section: Methodsmentioning

confidence: 99%

Serum 25-hydroxyvitamin D levels are associated with functional capacity but not with postural balance in osteoporotic postmenopausal women

Brech¹,

Ciolac²,

Peterson³

et al. 2017

Clinics

Self Cite

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“…Muscle strength variables were calculated from isokinetics tests. Only torque data from the second set was used for analysis to prevent a confounding influence of motor learning on clinical isokinetic performance [13]. The isokinetic variables used were maximum peak torque normalized by body weight (PTQ/BW), total work (TW), and torque knee flexor/torque knee extensor ratio.…”

Section: Methodsmentioning

confidence: 99%

Balance and Muscle Strength in Elderly Women Who Dance Samba

et al. 2016

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Considering the growth of the aging population, and the increasing risk for falls and related morbidity, it is vital to seek efficient, comprehensive, and culturally relevant prevention programs for elderly people to reduce risks for falls. The aim of the present study was to evaluate the postural balance and muscle strength among women participating in the "Wing of Baianas" in the carnival parades. One hundred and ten women, with an average age of 67.4±5.9 years, were divided into two groups: Baianas group—elderly participants of the carnival parades in the “Wing of Baianas”, and a Control group of women who do not dance samba. Assessments included a physical activity questionnaire, isokinetic muscle strength testing for the knee extensors and flexors, and a postural balance assessment completed on a force platform. There were no differences between groups, for postural balance outcomes, during the eyes open condition; however, with eyes closed, there was a significant effect between groups (Baianas vs Control) in all variables. The Baianas group showed less medio-lateral displacement (p < 0.04); and anteroposterior displacement (p < 0.007); larger amplitudes of medio-lateral displacement (p < 0.001); and anteroposterior displacement (p < 0.001); increased mean velocity (p < 0.01); and elliptical area (p < 0.01) There were no differences in the isokinetic peak torque corrected by body weight, total work and flexor/extensor ratio. Participation in the Wing of Baianas is associated with better balance with closed eyes, but there were no differences between dancers and non-dancers for muscle strength.

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“…Each participant was instructed to perform 5 sets of ankle plantar flexion and dorsiflexion through a 60° range of motion (ROM) (from 40° plantar flexion to 20° dorsiflexion) an angular velocity of 60°/sec. This is the best angular velocity for measuring muscle strength because it is easy, safe, and a large number of motor units are recruited at low angular velocities20 ) . The test procedures were performed twice, once before and once after the Wii training program in the experimental group and at the beginning of the study and then after 6 weeks in the control group.…”

Section: Methodsmentioning

confidence: 99%

Effect of Wiihabilitation on strength ratio of ankle muscles in adults

et al. 2016

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[Purpose] This study was conducted to investigate the effect of Wiihabilitation on the ankle dorsiflexion/plantar flexion strength ratio in adults. [Subjects and Methods] Thirty-two healthy male volunteers were randomly assigned to two equal groups (experimental and control). Participants in the experimental group received a Wiihabilitation training program for six weeks. Data were collected using a Biodex system 3 Isokinetic dynamometer. Peak torques of the dorsiflexors and plantar flexors were measured at an angular velocity of 60°/sec which in turn were used to derive the ankle dorsiflexion/plantar flexion strength ratio. [Results] The mean values of the ankle dorsiflexion/plantar flexion strength ratio decreased significantly between before and after the training in the experimental group, meanwhile there was no significant difference between before and after the training period in the control group . [Conclusion] Wiihabilitation has an impact on the ankle dorsiflexion/plantar flexion strength ratio, so it can be considered an effective training tool in terms of the ankle strength ratio. Thus, it could be recommended for both prevention and rehabilitation of ankle instability patients.

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The effects of motor learning on clinical isokinetic performance of postmenopausal women

Cited by 25 publications

References 23 publications

Serum 25-hydroxyvitamin D levels are associated with functional capacity but not with postural balance in osteoporotic postmenopausal women

Serum 25-hydroxyvitamin D levels are associated with functional capacity but not with postural balance in osteoporotic postmenopausal women

Balance and Muscle Strength in Elderly Women Who Dance Samba

Effect of Wiihabilitation on strength ratio of ankle muscles in adults

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