Marins, EF, Cabistany, L, Farias, CB, Dawes, J, and Del Vecchio, FB. Effects of personal protective equipment on metabolism and performance during an Occupational Physical Ability Test for Federal Highway Police officers. J Strength Cond Res 34(4): 1093–1102, 2020—Federal Highway Police (FHP) officers perform their duties while wearing personal protective equipment (PPE). Given the need for officers to wear PPE, it is important to understand the effects this additional load can have on occupational performance. The objective of this study was to evaluate the effects of load carriage on physiological, perceptual, and performance responses during an Occupational Physical Ability Test (OPAT). Thirteen male FHP officers completed an OPAT with PPE (WPPE, load = 12.0 kg) and without PPE (NPPE, load = 5.2 kg) in 2 separate sessions in a randomized and counterbalanced order. Metabolic responses (heart rate [HR] and its variability, and blood lactate concentration [Lac]), perceptual (rating of perceived exertion [RPE]), and OPAT performance were measured. Paired t and Wilcoxon tests were used to identify differences between conditions, and 2-way analysis of variance with Bonferroni post hoc was performed to analyze the results of Lac between the conditions. Occupational Physical Ability Test completion time was significantly greater in the WPPE condition compared with the NPPE condition (125.9 ± 13.8 vs. 118.3 ± 11 seconds, p < 0.01). Lac after the OPAT was higher in the NPPE condition compared with the WPPE (respectively 11.7 ± 2.7 vs. 9.6 ± 1.5 mmol·L−1, p < 0.05). The HRmax (NPPE = 180.5 ± 8.9 vs. WPPE = 178.3 ± 6.6 b·min–1, p = 0.44) and RPE (NPPE = 8.6 ± 0.8 vs. WPPE = 8.7 ± 1.0, p = 0.77) were not different between conditions. Personal protective equipment reduces performance in specific occupational circuit, changing Lac but without affecting HR and RPE. Strength and conditioning programs for FHP should aim to reduce the negative impact of additional load associate with wearing PPE.

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ResumoIntrodução: A análise temporal dos combates possibilita estudo dos padrões de luta nos esportes de combate, e se pode recriar os esforços em treinamentos específicos. Porém, não há informações disponíveis sobre análise temporal em diferentes níveis competitivos em lutas de Muay-Thai. Objetivo: Investigar as características temporais realizadas por atletas de Muay-Thai em competição oficial de nível nacional, segundo round, e comparar combates eliminatórios com disputas de medalhas. Materiais e métodos: Foram registradas 65 lutas masculinas de Campeonato Brasileiro. Empregouse estratégia de filmagem in loco e, para análise de tempo movimento, foi utilizado Software Kinovea®. Consideraram-se períodos de observação, preparação e interação, bem como relação de alta intensidade e baixa intensidade (AI:BI). A duração média dos rounds entre fases foi comparada com teste t de Student. Aplicou-se modelo linear generalizado considerando a duração de esforço como variável dependente, e nível competitivo, round e tipo de esforço como independentes. O nível de significância foi de 5%. Resultados: Em média, registraram-se de 7 a 8 s de observação, aproximadamente 3 s de preparação e 4 a 5,5 s de interação, com tempo de observação estatisticamente superior aos demais. Constatou-se diferença significante no tempo de interação entre lutas eliminatórias e finais (respectivamente 5,5 ± 0,3 s e 3,7 ± 0,5 s; p < 0,05). Ao se agruparem os tempos de observação e preparação como baixa intensidade (BI), e de interação como esforço de alta intensidade (AI), a relação AI:BI foi de 1:2 em lutas eliminatórias e de 1:3 nos combates finais. Conclusões: Conclui-se que o Muay-Thai se configura como uma modalidade de combate intermitente e que o tempo destinado à interação é inferior em confrontos finais quando comparados aos eliminatórios. Palavraschave: Artes marciais; desportos de combate; desempenho atlético; estudos de tempo e movimento. Temporal analysis of national level MuayThai matches: Effects of competitive phase AbstractIntroduction: Temporal analysis of matches allows the study of fighting patterns in combat sports. With this procedure, we can recreate the efforts in specific training. However, up to date have no information concerning temporal analysis considering competitive level in Muay-Thai. Objective: To investigate temporal characteristics of Muay-Thai athletes in official competition from national level, considering round, and to compare preliminary combats with those that had medal disputes. Material and methods: Were recorded 65 matches in a Brazilian championship. We conducted in loco recording. To time-motion analysis, Software Kinovea™ was used. Were considered Observation, Preparation and Interaction periods, as well as high intensity and low intensity ratio (HI:LI). The average duration of the rounds between competitive phases (preliminary or finals) was compared with a t test. A generalized linear model was applied considering effort duration as dependent variable and competitive level, round and effort type as