ORCID Profile
0000-0001-8155-4723
Current Organisation
Universidade Federal de Minas Gerais
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Publisher: Informa UK Limited
Date: 13-07-2016
DOI: 10.1080/17461391.2016.1194895
Abstract: Body composition is a physiological variable associated with physical activity and, in some cases, is related to athletic performance. Our objectives were to describe the body composition of participants in three distinct Paralympic sports and to compare the values of body density and estimated body fat obtained from the Paralympic athletes on the National Team by air-displacement plethysmography (ADP) and by the anthropometric method (skinfolds (SFs)). The s le consisted of 70 volunteers of both genders. The body composition of the volunteers was evaluated using the ADP in a Bod Pod(®) and seven SFs. There were no significant differences between the values obtained by ADP and SF for body fat percentage (p = .58) and body density (p = .49). Analysis by Bland-Altman plots showed mean differences of 0.56 ± 4.94 (-9.12-10.23) and -0.0017 ± 0.0113 (-0.024-0.020) for body fat percentage and body density, respectively. In conclusion, body composition analyses of Paralympic athletes by the ADP and SF methods show similar results, and ADP should be used as the first option when available. When the use of ADP is not possible, estimating body density and fat percentage by SF is a viable alternative for Paralympic athletes when future comparisons will use the same analysis method.
Publisher: Human Kinetics
Date: 05-2020
Abstract: Background : Physical exercise plays an important role in metabolic health, especially in the insulin-like growth factor-1 (IGF-1) system. The objective of this study was to perform a systematic review and meta-analysis to evaluate the effects of a single endurance and resistance exercise session on IGF-1 serum. Methods : The systematic review was performed in SPORTDiscus, MEDLINE, PubMed, and Google Scholar databases. All analyses are based on random-effect models. The study identified 249 records of which 21 were included. Results : There was an effect of endurance exercise on total IGF-1 ( P = .01), but not for free IGF-1 ( P = .36). Resistance exercise similarly only affected total IGF-1 ( P = .003) and not free IGF-1 ( P = .37). The effect size indicated that total IGF-1 is more affected (ES = 0.81) by endurance than by resistance exercise (ES = 0.46). The present study showed that IGF-1 serum concentrations are altered by exercise type, but in conditions which are not well-defined. Conclusions : The systematic review and meta-analysis suggest that there is no determinant in serum IGF-1 changes for the exercise load characteristic. Therefore, physical exercise may be an alternative treatment to control changes in IGF-1 metabolism and blood concentration.
Publisher: Georg Thieme Verlag KG
Date: 2021
Publisher: Oxford University Press (OUP)
Date: 08-2009
DOI: 10.1111/J.1743-6109.2009.01339.X
Abstract: Sleep disturbances are a frequent complaint in women and are often attributed to hormonal fluctuations during the menstrual cycle. Rodents have been used as models to examine the effects of sleep deprivation on hormonal and behavioral changes. Among the many comorbidities common to sleep disorders, sexual behavior remains the least well studied. To determine whether paradoxical sleep deprivation (PSD) can affect sexual receptivity (male acceptance) and proceptivity (male solicitation) behaviors in female rats. Female Wistar rats were subjected to PSD or were maintained as controls. After this period, the estrous cycle (proestrus, estrus, and diestrus) was determined, and all females were placed with a sexually experienced male. In order to investigate the role of hormones in sexual behavior, we included additional groups that were artificially induced to be sexually receptive via administration of a combination of estradiol and progesterone. Receptivity and proceptivity behaviors, as well as progesterone and corticosterone concentrations were monitored. Selective sleep loss caused a significant increase in proceptivity and receptivity behaviors in females exclusively during the proestrus phase. The rejection response was increased in PSD rats during the estrus and diestrus phases, as compared with PSD-receptive and proestrus females. PSD reduced progesterone levels during the proestrus phase relative to the respective control group during the same phase of the estrous cycle. The PSD-proestrus females that displayed the most robust sexual response exhibited greater concentrations of corticosterone than PSD-diestrus females, with an absence of sexual solicitation behaviors. PSD produced a distinct response in the hormonal profile that was consistent with the phase of the estrous cycle. These results show that sleep loss can affect sexual motivation and might lead to important clinical implications, including alterations in female physiology and reproductive abnormalities.
Publisher: Human Kinetics
Date: 12-2016
Abstract: Body-composition assessments of high-performance athletes are very important for identifying physical performance potential. Although the relationship between the kinanthropometric characteristics and performance abilities of Olympic swimmers is extremely important, this subject is not completely understood for Paralympic swimmers. To investigate the relationship between body composition and sport performance in Brazilian Paralympic swimmers 6 mo after training. Experimental pre osttest design. Research laboratory and field evaluations of swimming were conducted to verify the 50-m freestyle time of each athlete. 17 Brazilian Paralympic swim team athletes (12 men, 5 women). Body-composition assessments were performed using a BOD POD, and swimming performance was assessed using the 50-m freestyle, which was performed twice: before and after 6 mo of training. Increased lean mass and significantly reduced relative fat mass and swimming time ( P .05) were observed 6 mo after training. Furthermore, a positive correlation between body-fat percentage and performance ( r = .66, P .05) was observed, but there was no significant correlation between body density and performance ( r = –.14, P .05). After a 6-mo training period, Paralympic swimmers presented reduced fat mass and increased lean body mass associated with performance, as measured by 50-m freestyle time. These data suggest that reduced fat-mass percentage was significantly correlated with improved swimming performance in Paralympic athletes.
Publisher: Termedia Sp. z.o.o.
Date: 2020
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 10-2015
Publisher: Research, Society and Development
Date: 09-12-2021
DOI: 10.33448/RSD-V10I16.23761
Abstract: Introdução: A privação ou restrição do sono, reflete na qualidade de vida das pessoas e no aumento da sonolência diurna. Por outro lado, o exercicio físico contribui na melhora da qualidade do sono. Um sono de baixa qualidade é mais prevalente em pessoas com lesão medular (LM) do que na população sem LM. Objetivo: Avaliar a qualidade do sono e a sonolência em Jogadores de basquetebol em cadeira de rodas (JBCR). Métodos: A amostra foi constituída por 11 voluntários do sexo masculino, atletas de basquete em cadeira de rodas, com LM completa ou incompleta de torácica 5 (T5) a lombar 1 (L1). Os voluntários responderam ao questionário de Qualidade do Sono de Pittsburgh (PSQI) e para avaliar a sonolência diurna foi utilizada a versão traduzida da Escala de Sonolência de Epworth. Foi utilizada uma estatística descritiva para apresentação dos dados. Resultados: 8 atletas (72%), tem a qualidade de sono ruim atingindo pontuações acima de 5 no PSQI. Com relação ao tempo total de sono, os resultados encontrados mostram uma duração do sono ou tempo total de sono (TTS) de 7,5 horas. A eficiência do sono foi de 84% e 7 atletas (63%) apresentaram latência superior a 15 minutos. Conclusão: Os JBCR apresentam uma qualidade de sono ruim, como demonstrado pelo PSQI. Entretanto, nós acreditamos que a prática regular do exercício físico pode ter atenuado os efeitos deletérios da LM sobre o sono.
No related grants have been discovered for Andressa Silva.