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This study investigated the extent to which mental fatigue and emotional suppression affected exercise endurance. Twelve participants performed cycling endurance tests at 80% of their peak power up to the point of exhaustion. Two experimental conditions (mental fatigue [MF] and emotion suppression conditions [ES]) and a control condition (CO) were administered. Participants responded to psychological measures throughout the exercise trials. Both MF and ES conditions hindered exercise performance relative to the CO, and there was no statistically significant difference between the negative effects of both MF and ES conditions. Of note, however, higher levels of subjective fatigue were reported in MF, prior to commencing the exercise test. High cognitive loads that induce MF and/or engaging in ES may reduce high intensity endurance exercise performance among young adults, but further research with greater numbers of participants is needed to replicate and extend these findings.

This study compared central and peripheral fatigue development between the Sprint and Olympic distance triathlon. Fifteen male triathletes performed Sprint and Olympic triathlon simulations in a randomized and counterbalanced order. Central and peripheral fatigue was evaluated from changes in voluntary activation level (VAL) and twitch responses of quadriceps muscle (Q

The aims of this study were to perform the cross-cultural adaptation of the Borg Rating of Perceived Exertion (RPE) 6–20 Scale to Brazilian Portuguese language and to start testing its validity and...

The identification of physiological transition thresholds (TT) is commonly used for prescribing and evaluating the performance of endurance athletes; however, the methods need further investigation in mountain runner athletes. The aim of the present review was to analyze the different methods used to determine TT in mountain runners. After analyzing 1,176 articles found in different databases, 4 articles that presented a relationship with the theme were selected. Varied proposals were observed, in which the surveys searched for physical and/or cardiorespiratory performance, as well as the effect of acclimatization and training at different altitudes in mountain runners. All studies used spirometry to identify the anaerobic threshold through visual methods and a relative mean intensity in thresholds occurred at 80 – 90% of VO2max. The results of studies analyzed evidenced the limited use of methodologies in the identification of exercises for training evaluation and prescription, as well as the use of effective and low-cost alternative methods to determine these thresholds in mountain runners.

The aim of this systematic review was to analyze the cross-cultural adaptation and validation processes of Borg’s Rating of Perceived Exertion Scale (6-20) and its instructions during exercise in adults and the elderly. The study was conducted using databases that include the areas of health, sports and psychology (Pubmed, ScienceDirect, Bireme (BVS), PsycINFO, SportDiscus and Scopus), and descriptors in the English and Portuguese languages were standardized for all databases ("exercise" / "exercicio", "validity" / "validade", "borg scale" / "escala de borg"; "perceived exertion" / "percepção de esforço" and "validation" / "validação"). Among the 1,488 items found, 14 articles were selected for analysis. The main findings were that cross-cultural adaptation (Cantonese and Japanese) was reported in only four articles. The lowest-scored criteria for methodological quality were related to the concept of perceived exertion, and the instructions for use and familiarization with Borg’s scale. The results indicate that the majority of the studies did not apply the cross-cultural adaptation process and additionally, that concurrent validity was the only validation method reported. Therefore, it is necessary to carry out the cross-cultural adaptation of Borg’s Scale (6-20), mainly in the Portuguese language, in addition to other types of validation in order to ensure more accurate results.

Objetivo: verificar o comportamento para a prática de atividade física (AF) e seu impacto nos indicadores antropométricos de obesidade em professores universitários. Método: oitenta docentes foram selecionados aleatoriamente (40 homens e 40 mulheres) e após o auto relato da massa corporal (MC) e da estatura, o Índice de Massa Corporal (IMC) foi determinado e utilizado como indicador de obesidade. A medida de circunferência da cintura (CC) foi empregada como indicador de adiposidade abdominal e o comportamento para a atividade física foi definido a partir dos estágios de mudança de comportamento (EMC). Resultados: os dados indicaram uma maior prevalência das professoras do que dos professores para inatividade física. Entretanto, enquanto a maioria dos homens foi classificada na faixa de sobrepeso, as mulheres foram classificadas na faixa de normalidade para o IMC. E para a distribuição de adiposidade identificada pela CC, aproximadamente 18% das mulheres e 20% dos homens demonstraram valores superiores daqueles desejados para a saúde. Considerações finais: o EMC teve um impacto nos indicadores antropométricos de obesidade somente para o sexo masculino.