Injuries in CrossFit practioner: a cross-sectional study

Abstract Aim: The present study aimed to investigate epidemiological parameters associated with the onset of injuries in CrossFit practitioners. Methods: Cross-sectional study, with fifty-two subjects (28 ± 7 years,70 ±13 kg), regular practitioners of CrossFit, of intermediate level. The Rombaldi questionnaire was applied, related to the occurrence of injuries during physical activity. The Shapiro-Wilk normality test, Pearson's chi-square, and Fisher's exact test were used, using p < 0.05. Results: Our findings show that the prevalence of injury in cross-fitters is 38%, having an incidence rate of 3.7 per 1000 h of training. The most recurrent injury was stretching (41%). The most affected regions were the shoulder and lumbar (34%). The exercise model with the highest association with injury development was Olympic weightlifting (p = 0.004). Conclusion: The CrossFit practice showed a moderate prevalence of injuries, stretching the main type. The most affected regions were the shoulders and the lumbar. In relation to the most dangerous exercise model for the appearance of injuries, the Olympic weightlifting exercises stand out.

Qualidade de vida e fatores associados em trabalhadores de uma Universidade do Sul de Santa Catarina / Quality of life and factors associated of University employees from southern Santa Catarina State

Resumo Introdução A qualidade de vida de trabalhadores interfere no desenvolvimento e na produtividade do trabalho e pode ser influenciada por diversos fatores sociodemográficos e laborais. Objetivo Avaliar os fatores associados à qualidade de vida de funcionários de uma Universidade. Método Estudo transversal realizado com 214 trabalhadores de ambos os sexos pertencentes aos dezenove setores da Universidade. Para avaliar a qualidade de vida, utilizou-se o WHOQOL-Bref. A associação de cada domínio da qualidade de vida com as variáveis de exposição foi avaliada através do teste t para amostras independentes ou análise de variância, seguida do teste de Bonferroni. Resultados As médias dos domínios de qualidade de vida foram: 74,64 (±13,52) para o físico, 71,12 (±12,85) para o psicológico, 76,94 (±13,98) para o de relações sociais e 61,94 (±16,30) para o ambiente. Os homens apresentaram maiores médias para os domínios físico, psicológico e de relações sociais. Trabalhadores com idade maior do que 38 anos apresentaram maiores médias no domínio psicológico. Já no domínio relações sociais, as maiores médias foram observadas entre os indivíduos de 18 a 27 anos. Naqueles indivíduos que dormiam menos de 8 horas por dia, as médias do domínio físico foram menores. Conclusão Fazem-se necessárias ações de prevenção e promoção da qualidade de vida no trabalho, especialmente direcionadas aos funcionários que apresentaram as menores médias nos domínios de qualidade de vida.

Abstract Background Life quality of workers influences on development and productivity of work and it can be influenced by several sociodemographic and labor factors. Objective To evaluate the associated factors with quality of life of University workers from southern Santa Catarina State. Method A cross-sectional study with 214 workers was carried out. WHOQOL-Bref was used to evaluate the quality of life. The quality of life domains were associated to exposure variables. The statistical analysis T-test for independent samples and analysis of variance, followed by the Bonferroni test were used. Results The mean of quality of life domains were: 74.64 (±13.52) for the physical domain, 71.12 (±12.85) for the psychological, 76.94 (±13.98) for social relations domain and 61.94 (±16.30) for the environment domain. Males presented higher mean for the physical, psychological and social relations domains. Workers older than 38 years of age presented higher means in the psychological domain. In the social relations domain, the highest mean was observed among individuals aged 18 to 27 years. In those individuals who slept less than 8 hours a day, the mean of the physical domain were smaller. Conclusion It is necessary the development of actions to prevent and promote life quality at work focusing on employees who had the lowest averages of the domains of that.

Effects of different frequencies of physical training on electron transport chain and oxidative damage in healthy mice

The present study investigated the effect of different frequencies (three and five times a week) on electron transport chain and oxidative stress after 8 weeks of run training. Methods: Eighteen male mice (CF1, 30-35g) were distributed into the following groups (n=6): untrained (UT); trained three-time per week (T3) and trained five- time per week (T5). All training sessions were at the same intensity and duration (45min/day) in a treadmill for small animals. Forty-eight hours after the last training session, the animals were killed by decapitation and quadriceps (red portion) was removed and stored at -70ºC. Succinate dehydrogenase (SDH), complexes I, II, II-III, IV and hydroperoxides were measured. Results: Training sessions for five times per week were more effective in increasing the mitochondrial respiratory chain enzyme activities (SDH, complexes I, II, II-III, IV) as well as in decreasing the formation hydroperoxides than sessions performed for three times training per week (p<0.05). Conclusion: Our findings clearly showed that a higher the frequency of training session promotes a greater activity of the electron transport chain and consequently reduces the oxidative stress in healthy animals.(AU)