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| Author(s): |
Matheus Machado Gomes
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Ribeirão Preto. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Medicina de Ribeirão Preto (PCARP/BC) |
| Defense date: | 2012-08-16 |
| Examining board members: |
Daniela Cristina Carvalho de Abreu;
Eduardo Ferriolli;
Debora Bevilaqua Grossi;
Renato de Moraes;
Paulo Roberto Pereira Santiago
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| Advisor: | Daniela Cristina Carvalho de Abreu |
| Abstract | |
The postural control of elderly has been studied with the aim of better understanding the factors that lead these women to have more falls than young individuals. The reduction in the muscle strength and power are among the aspects that contribute to the impairment of postural control. However, it is still unclear if the capacity of elderly to produce strength and muscle power is distinctive when comparing different ages. In addition, there is little information about the relationship between muscle strength and power with the performance of postural control in older women of different ages. Thus, the purpose of this study was to evaluate the muscular strength and power and its relation with the performance of postural control in elderly of different ages. Eighty women were divided into four groups according to their ages: Group Young (n=20) aged between 18 and 30 years; Group 60-64 (n = 20) aged between 60 and 64 years, Group 65-69 (n = 20) aged between 65 and 69 years and Group 70-74 (n = 20) aged between 70 and 74 years. The subjects performed tests for maximal strength (1-RM) and muscle power produced by knee extensor and flexor muscles in the intensities 40%, 70% and 90% of 1-RM using an extensor/flexor equipment. The sway of center of pressure (force plate) and the muscle activity (Vastus lateralis, Tibialis Anterior, Biceps Femoris and Gastrocnemius Lateralis) were analyzed during the maintenance of postural control in static, dynamics and with disturbance of the support base situations. The results revealed that women from three elderly groups (60-64, 65-69 and 70-74 years) have similar muscle strength and power, but lower compared to young group. Moreover, the results showed that women from three elderly groups are also similar with respect to the performance of postural control, but worse than young. There was no difference between groups for muscle activity. Multiple linear regression analyzes indicated that the strength and muscle power were weakly related to the performance of postural control. Therefore, these results indicate that for women aged between 60 and 74 years, muscular strength and power are similar and have little influence on the performance of postural control that is also similar in this age group. (AU) | |
| FAPESP's process: | 08/09449-2 - INFLUENCE OF MUSCLE STRENGTH AND POWER ON STATIC AND DYNAMIC BALANCE OF ELDERLY WOMEN |
| Grantee: | Matheus Machado Gomes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |