S would also show less muscle damage in the second than in the first eccentric exercise bout (i.e., repeated bout effect) as shown in untrained individuals. This study investigated changes in indirect markers of muscle damage after 2 bouts of free weight eccentric exercise performed by 8 resistance-trained men. The participants (24.4 ± 1.2 years) performed 4 sets of 8 eccentric actions (3 seconds for each repetition) at 70% of eccentric 1 repetition maximum (1RM) load in a bench press exercise with 2 minutes of rest between sets, and repeated the same exercise 2 weeks later. Bench press 1RM, delayed onset muscle soreness (DOMS) assessed by a 6-point Likert scale, serum creatine kinase (CK) activity, and plasma prostaglandin E2 concentration (PGE2) were measured before and 24, 48, 72, and 96 hours after the exercise, and the changes were compared between bouts. The changes in the variables were smaller (p ≤ 0.05) after the second than the first bout indicated by a smaller decline in 1RM strength (first bout: −10.2 ± 1.0% vs. second bout: −5.7 ± 1.5%), peak DOMS (3.8 ± 0.4 vs. 1.7 ± 0.5), peak CK (637.3 ± 133.3 vs. 305.4 ± 63.6 IU·L−1), and peak PGE2 (761.2 ± 171.0 vs. 307.2 ± 48.3 pg·mL−1). These results show a typical repeated bout effect. Thus, it is concluded that the repeated bout effect occurs in resistance-trained individuals....

The purpose of this study was to evaluate the impact of moderate-load (10 RM) and low-load (20 RM) resistance training schemes on maximal strength and body composition. Sixteen resistance-trained men were randomly assigned to 1 of 2 groups: a moderate-load group (n = 8) or a low-load group (n = 8). The resistance training schemes consisted of 8 exercises performed 4 times per week for 6 weeks. In order to equate the number of repetitions performed by each group, the moderate load group performed 6 sets of 10 RM, while the low load group performed 3 sets of 20 RM. Between-group differences were evaluated using a 2-way ANOVA and independent t-tests. There was no difference in the weekly total load lifted (sets × reps × kg) between the 2 groups. Both groups equally improved maximal strength and measures of body composition after 6 weeks of resistance training, with no significant between-group differences detected. In conclusion, both moderate-load and low-load resistance training schemes, similar for the total load lifted, induced a similar improvement in maximal strength and body composition in resistance-trained men.

A pandemia do novo coronavírus (COVID-19) e a crise de saúde pública tem gerado estresse em toda a população. O presente estudo teve como objetivo examinar a prática de Yoga e a sua relação com os níveis de ansiedade, depressão e estresse durante a pandemia de COVID-19. O estudo foi baseado em um questionário on-line anônimo aplicado entre 19 e 26 de maio de 2020, com questões sociodemográficas, sobre a prática de Yoga durante a pandemia e a Escala de Ansiedade Depressão e Estresse (DASS-21). Duzentos e treze participantes completaram o questionário. No geral, foram observados 12,2%, 12,2% e 8,0% de sintomas severos para estresse, ansiedade e depressão, respectivamente. Na análise de regressão logística (expressos em odds ratio; intervalo de confiança de 95%), participantes mais velhos tiveram menores chances de apresentar sintomas severos de estresse (OR = 0,30; IC95%: 0,13 – 0,70) e depressão (OR = 0,34; IC95%: 0,12 - 0,92), enquanto o tabagismo aumentou as chances (OR = 7,71; IC95%: 2,36 - 25,21) de sintomas severos de ansiedade. Uma maior experiência na prática de Yoga reduz significativamente as chances de apresentar sintomas severos de estresse (OR = 0,34; IC95% 0,14 - 0,83) e ansiedade (OR = 0,37; IC95% = 0,15 - 0,91). Ademais, houve menores chances de apresentar sintomas severos de estresse em praticantes que realizam um maior número de sessão semanal durante a pandemia (OR = 0,09; IC95% = 0,01 - 0,88), e de sintomas depressivos para aqueles que conseguiram manter a frequência da prática em relação ao período antes da pandemia (OR = 0,23; IC95%: 0,06 - 0,84). Nossos dados observacionais sugerem que praticantes mais experientes e que realizam mais sessões semanal reportam menor impacto psicológico durante a pandemia por COVID-19.

This study aimed to investigate the effects of interval and continuous training on the body mass gain and adiposity levels of rats fed a high-fat diet. Forty-eight male Sprague-Dawley rats were randomly divided into two groups, standard diet and high-fat diet, and received their respective diets for a period of four weeks without exercise stimuli. After this period, the animals were randomly divided into six groups (n=8): control standard diet (CS), control high-fat diet (CH), continuous training standard diet (CTS), continuous training high-fat diet (CTH), interval training standard diet (ITS), and interval training high-fat diet (ITH). The interval and continuous training consisted of a swimming exercise performed over eight weeks. CH rats had greater body mass gain, sum of adipose tissues mass, and lower serum high density lipoprotein values than CS. The trained groups showed lower values of feed intake, caloric intake, body mass gain, and adiposity levels compared with the CH group. No significant differences were observed between the trained groups (CTS versus ITS and CTH versus ITH) on body mass gains and adiposity levels. In conclusion, both training methodologies were shown to be effective in controlling body mass gain and adiposity levels in high-fat diet fed rats.