Chemical composition and nymphicidal effect of essential oils from fruits of four Piper species (Piperaceae) against Tibraca limbativentris nymphs (Hemiptera: Pentatomidae).

This study aimed to verify the nymphicidal action of essential oils from fruits of 4 Piperaceae species against T. limbativentris nymphs. Fruits were collected in 3 brazilian states (P malacophyllum and P. marginatum: Pará, P. aduncum: Mato Grosso and P. gaudichaudinaum: Paraná)

Effects of musical tempo on physiological, affective, and perceptual variables and performance of self-selected walking pace

[Purpose] This study investigated the effects of musical tempo on physiological, affective, and perceptual responses as well as the performance of self-selected walking pace. [Subjects] The study included 28 adult women between 29 and 51 years old. [Methods] The subjects were divided into three groups: no musical stimulation group (control), and 90 and 140 beats per minute musical tempo groups. Each subject underwent three experimental sessions: involved familiarization with the equipment, an incremental test to exhaustion, and a 30-min walk on a treadmill at a self-selected pace, respectively. During the self-selected walking session, physiological, perceptual, and affective variables were evaluated, and walking performance was evaluated at the end. [Results] There were no significant differences in physiological variables or affective response among groups. However, there were significant differences in perceptual response and walking performance among groups. [Conclusion] Fast music (140 beats per minute) promotes a higher rating of perceived exertion and greater performance in self-selected walking pace without significantly altering physiological variables or affective response

The use of session RPE to monitor the intensity of weight training in older women: Acute responses to eccentric, concentric, and dynamic exercises

The rating of perceived exertion (RPE) is ability to detect and interpret organic sensations while performing exercises. This method has been used to measure the level of effort that is felt during weight-training at a given intensity. The purpose of this investigation was to compare session RPE values with those of traditional RPE measurements for different weight-training muscle actions, performed together or separately. Fourteen women with no former weight-training experience were recruited for the investigation. All participants completed five sessions of exercise: familiarization, maximum force, concentric-only (CONC-only), eccentric-only (ECC-only), and dynamic (DYN = CONC + ECC). The traditional RPE method was measured after each series of exercises, and the session RPE was measured 30 min after the end of the training session. The statistical analyses used were the paired t-test, one-way analysis of variance, and repeated measures analysis of variance. Significant differences between traditional RPE and session RPE for DYN, CONC, and ECC exercises were not found. This investigation demonstrated that session RPE is similar to traditional RPE in terms of weight-training involving concentric, eccentric, or dynamic muscle exercises, and that it can be used to prescribe and monitor weight-training sessions in older subjects. © 2014 Sandro S. Ferreira et al

Cutoff for body mass index in adolescents: comparison with national and international reference standards

OBJETIVO: elaborar uma tabela percentílica para o índice de massa corporal (IMC) para adolescentes na faixa etária de 10 a 14 anos da cidade de Curitiba, Paraná, e comparar os valores encontrados para o sobrepeso (percentil 85) e obesidade (percentil 95) com referências de IMC nacional, regional e internacional. MÉTODO: estudo longitudinal misto com 5231 avaliações, 2471 em meninos e 2760 em meninas, idades entre 10 e 14 anos. Esse número foi obtido a partir de avaliações semestrais realizadas entre os anos de 1998 a 2002, gerando 4321 observações (estudo longitudinal), mais a avaliação de 910 indivíduos no ano de 2006 (estudo transversal). O IMC foi calculado pela razão entre a massa corporal (Kg) dividida pela estatura (m) ao quadrado. Foram elaboradas tabelas de frequência baseadas na distribuição percentílica. Para identificar as diferenças nos pontos de corte para sobrepeso e obesidade com os estudos nacionais de Cintra e de Conde e Monteiro e com o estudo internacional de Cole foi utilizado teste binomial não paramétrico. RESULTADOS: comparando com as referências, os jovens de Curitiba seriam superestimados com sobrepeso se utilizadas a referência de Conde e a de Cole e subestimados na referência regional de Cintra. As mesmas tendências foram observadas com relação ao percentil 95 (obesidade), porém não para todas as faixas etárias. CONCLUSÃO: observamos diferenças nos valores de IMC sugeridos como pontos de corte para sobrepeso e obesidade em relação às referências nacionais e internacionais reforçando a necessidade de utilização de referências específicas para cada população.OBJECTIVE: to develop a scale percentile for body mass index (BMI) for adolescents aged 10 to 14 years from the city of Curitiba, Paraná, and compare the values found for overweight (85th percentile) and obesity (95th percentile) with references to national and international BMI. METHOD: mixed longitudinal study with 5231 evaluation, 2471 in boys and girls in 2760, aged 10 and 14 years. This number was obtained from semester evaluations conducted between the years 1998 to 2002, generating 4321 observations (longitudinal study), further evaluation of 910 individuals in 2006 (cross-sectional study). BMI was calculated as the ratio of body mass (kg) divided by height (m) squared. Frequency tables were prepared based on the percentile distribution. To identify differences in cut-off points for overweight and obesity with the national study of Cintra, and Conde and with the international study of Cole non-parametric binomial test was used. RESULTS: compared with the references, the young people of Curitiba were overestimated overweight if used for the reference of Conde and Cole and underestimated in the regional reference Cintra. The same trends were observed with respect to the 95th percentile (obesity), but not for all ages. CONCLUSION: we observed differences in the values of BMI suggested as cut-off points for overweight and obesity in relation to national and international references emphasizing the need to use specific references for each population

Feeling of pleasure to high-intensity interval exercise is dependent of the number of work bouts and physical activity status

Objectives: To examine the affective responses during a single bout of a low-volume HIIE in active and insufficiently active men. Materials and methods: Fifty-eight men (aged 25.3 ± 3.6 years) volunteered to participate in this study: i) active (n = 29) and ii) insufficiently active (n = 29). Each subject undertook i) initial screening and physical evaluation, ii) maximal exercise test, and iii) a single bout of a low-volume HIIE. The HIIE protocol consisted of 10 x 60s work bouts at 90% of maximal treadmill velocity (MTV) interspersed with 60s of active recovery at 30% of MTV. Affective responses (Feeling Scale, -5/+5), rating of perceived exertion (Borg's RPE, 6-20), and heart rate (HR) were recorded during the last 10s of each work bout. A two-factor mixed-model repeated measures ANOVA, independent-samples t test, and chi-squared test were used to data analysis. Results: There were similar positive affective responses to the first three work bouts between insufficiently active and active men (p > 0.05). However, insufficiently active group displayed lower affective responses over time (work bout 4 to 10) than the active group (p 0.05). Conclusions: Insufficiently active and active men report feelings of pleasure to few work bouts (i.e., 3-4) during low-volume HIIE, while the affective responses become more unpleasant over time for insufficiently active subjects. Investigations on the effects of low-volume HIIE protocols including a fewer number of work bouts on health status and fitness of less active subjects would be interesting, especially in the first training weeks