Physiological and perceptual responses to aerobic exercise with and without blood flow restriction. J Strength Cond Res 35(9): 2479-2485, 2021-Although previous studies have demonstrated the potential benefits of aerobic exercise (AE) with blood flow restriction (BFR), these findings have been limited by the approaches used to determine the occlusive pressure. In addition, the physiological and perceptual responses of AE with BFR compared to high-intensity interval exercise (HIIE) remain unclear. Thus, we investigated the physiological and perceptual responses to AE with and without BFR, and HIIE. Twenty-two men were randomly assigned to 4 experimental conditions: AE (40% of maximal oxygen consumption [V _ O2peak]), AE with 50% of BFR (AE-BFR: 40% VV _ O2peak), HIIE (80% V _ O2peak), and a no exercise control condition (CON: 50% of BFR). Each exercise bout lasted 18 minutes, during which oxygen consumption (V _ O2), heart rate (HR), and ratings of perceived exertion (RPE) were measured at rest and at every 3 minutes during exercise. Ratings of discomfort before and after each trial. The HIIE condition induced the greatest increases in V _ O2 and HR (p , 0.05), whereas AE-BFR was significantly (p , 0.05) greater than AE and CON. HIIE and AE-BFR also elicited the greatest (p , 0.05), but similar (p . 0.05), increases in RPE during exercise, although AE-BFR was significantly greater than HIIE immediately after exercise (p , 0.05). AE-BFR and HIIE also induced similar levels of discomfort after exercise (p . 0.05). In conclusion, HIIE induced the greatest increases in V _ O2 and HR, although the perceptual responses were essentially the same compared with AE-BFR. However, albeit inferior to HIIE, V _ O2 was greater during AE-BFR compared with AE, indicating that this training method may be used to replace HIIE and still significantly elevate V _ O2.

Boas relações entre os componentes da aptidão física relacionada à saúde (AFRS) melhoram o desempenho da atividade ocupacional de policiais militares. Objetivo: Verificar a relação entre componentes da AFRS em policiais militares do Batalhão de Operações Policiais Especiais (BOPE) e do Batalhão de Policiamento de Trânsito (BPTRAN). Método: Participaram do estudo 47 policiais com idades entre 26 e 49 anos do sexo masculino fracionados em dois grupos: BOPE (n=25) e o BPTRAN (n=22). Foi realizada uma bateria de testes: medidas antropométricas, teste de sentar-e-alcançar no banco de Wells, teste de abdominal de 1 minuto, teste de flexão dos cotovelos e teste vai-e-vem de 20 metros, para avaliar os componentes morfológico, cardiorrespiratório e neuromuscular da AFRS. Resultados: Ambos os grupos obtiveram de moderada à forte correlação negativa significante em relação à circunferência de cintura (CC), índice de massa corpórea (IMC) e percentual de gordura (PG) com a resistência muscular localizada (RML) (r=-0,589; r=-0,404; r=-0,637) e a força muscular dinâmica (FD) (r=0,592; r=-0,416; r=-0,651) (p<0,05). Contudo, houve correlações positivas e negativas significantes entre o consumo máximo de oxigênio (VO 2 máx ) e as variáveis CC, IMC, PG e RML (p<0,05), exceto para flexibilidade no BOPE. Conclusão: Existe uma forte correlação entre os componentes morfológico, cardiorrespiratório e neuromuscular, exceto para a flexibilidade em PMs do BOPE. Tal fato permite afirmar que a AFRS é uma variável global. Palavras-chave | cineantropometria; aptidão física; esgotamento profissional; saúde do trabalhador; polícia.