do Carmo E.C.,University of Sao Paulo |
Junior C.R.B.,University of Sao Paulo |
Fernandes T.,University of Sao Paulo |
Barretti D.,University of Sao Paulo |
And 5 more authors.
Revista Brasileira de Medicina do Esporte | Year: 2011
Introduction: The effects of the anabolic steroids (AS) on muscle mass and strength are controversial and dependent on the training protocol performed and the muscle fibers recruited. Thus, the aim of this study was to evaluate the AS effects combined with strength training or aerobic exercise training on muscle hypertrophy and strength. Methods: Wistar rats (42) were divided into six groups: sedentary control (SC, n = 7), steroid sedentary (SS, n = 7), swimming training control (STC, n = 7), swimming training steroid (STS, n = 7), strength training control (SRC, n = 7) and strength training steroid (SRS, n = 7). AS was administered twice a week (10mg/kg/week). The training protocols were performed for 10 weeks, 5 sessions per week. Soleus, gastrocnemius and plantar hypertrophy (muscle mass corrected for tibia length), total muscle protein (Bradford) and muscle strength in hind limb (resistance to twist) were assessed. Results: No significant differences were observed in soleus muscle hypertrophy. SRC and SRS groups showed hypertrophy of 18% and 31% in plantar muscles compared to the SC group. Hypertrophy was 13% higher in SRS than SRC group. Similar results were found in gastrocnemius muscle. SRC and SRS groups showed significant increases in the protein total amount in the plantar muscles, it was more pronounced in SRS group and positively correlated to muscle hypertrophy. The strength was increase in SRC and SRS groups. Conclusion: AS administration or its association to aerobic training does not increase muscle mass and strength. However, its association to strength training leads to muscle hypertrophy in glycolytic fibers. Therefore, the physical training protocol, muscle recruitment and muscle fibers characteristics, appear to have significant impact on anabolic responses induced by AS.
Dias C.P.,Physical Education Course |
Dias C.P.,Federal University of Rio Grande do Sul |
Toscan R.,Physical Education Course |
de Camargo M.,Physical Education Course |
And 5 more authors.
Age | Year: 2015
The aim of the study was to assess the effect of eccentric training using a constant load with longer exposure time at the eccentric phase on knee extensor muscle strength and functional capacity of elderly subjects in comparison with a conventional resistance training program. Twenty-six healthy elderly women (age = 67 ± 6 years) were randomly assigned to an eccentric-focused training group (ETG; n = 13) or a conventional training group (CTG; n = 13). Subjects underwent 12 weeks of resistance training twice a week. For the ETG, concentric and eccentric phases were performed using 1.5 and 4.5 s, respectively, while for CTG, each phase lasted 1.5 s. Maximum dynamic strength was assessed by the one-repetition maximum (1RM) test in the leg press and knee extension exercises, and for functional capacity, subjects performed specific tests (6-m walk test, timed up-and-go test, stair-climbing test, and chair-rising test). Both groups improved knee extension 1RM (24–26 %; p = 0.021), timed up-and-go test (11–16 %; p < 0.001), 6-m walk test (9–12 %; p = 0.004), stair-climbing test (8–13 %; p = 0.007), and chair-rising test (15–16 %; p < 0.001), but there was no significant difference between groups. In conclusion, the strategy of increasing the exposure time at the eccentric phase of movement using the same training volume and intensity does not promote different adaptations in strength or functional capacity compared to conventional resistance training in elderly woman. © 2015, American Aging Association.
Urinary incontinence and perineal muscle function in physically active and sedentary elderly women [Incontinência urinária e função muscular perineal em idosas praticantes e não-praticantes de atividade física regular]
Virtuoso J.F.,Rua Pascoal Simone |
Mazo G.Z.,Santa Catarina State University |
Menezes E.C.,Physical Education Course
Revista Brasileira de Fisioterapia | Year: 2011
Objective: To identify the presence of urinary incontinence and compare perineal muscle function among physically active and sedentary older women. Methods: The sample consisted of 39 elderly women, 28 of whom got regular physical activity (AG) and 11 did not (SG). We collected data on risk factors for pelvic floor weakness and the presence of urinary incontinence (UI). The evaluation of perineal function was performed using PERFECT and perineometry. The data were processed with descriptive (simple frequencies, percentages, measures of position and dispersion) and inferential statistics (Chi-square or Fisher Exact Test, when necessary, and Mann-Whitney) with a significance level of 5%. Results: There was a higher mean age (p=0.04) in AG. The occurrence of UI in the sample was 56.4%. Urge UI was associated with SG (p=0.022). All PERFECT variables were higher in AG than SG, with significant differences for the variables "repetitions" (p=0.008) and "fast" (p=0.022). Perineometry revealed that fast twitch fibers (p=0.008) and slow twitch fibers (p=0.05) were higher in the AG. Conclusion: AG had better pelvic floor muscle function. However, the prevalence of UI was higher in this group, which suggested the influence of age on the urinary continence mechanism. © Revista Brasileira de Fisioterapia.