Caracterização da condição física e fatores de risco cardiovascular de policiais militares rodoviários

ResumoObjetivoO objetivo do presente estudo foi verificar os níveis de condição, composição corporal e pressão arterial de policiais rodoviários do estado do Paraná - Brasil.MétodoFizeram parte da amostra 52 oficiais do sexo masculino (idade: 38,3±6,3 anos, massa corporal: 89,6±18,4kg) de diferentes patentes. Foram realizadas diversas mensurações para obtenção do índice de massa corporal (IMC), circunferência de cintura (CC), relação cintura/quadril (RCQ), composição corporal por meio da espessura de dobras cutâneas, potência aeróbia estimada indiretamente em teste de esforço ergométrico, resistência muscular localizada (RML) de membros superiores e abdominal e os níveis pressóricos foram aferidos por método auscultatório.ResultadosConsiderando as variáveis analisadas, os policiais rodoviários apresentaram IMC de 28,6±4,8kg/m2, risco cardiovascular elevado (95,4±10,8cm) para CC e alto (0,92±0,05) para RCQ. O percentual de gordura corporal apresentou-se acima dos valores recomendáveis (23,6±4,3 %) para saúde, a potência aeróbia estimada foi considerada boa (34,8±1,1ml/kg/min), a RML de membros superiores (21±8 repetições) e foi obtida por realização dos testes de abdominal e flexão de braço, respectivamente (28±8 repetições) foram classificadas como média e uma parcela importante dos oficiais (23 %) mostraram-se com níveis pressóricos elevados.ConclusãoOs policiais militares rodoviários mostraram-se com níveis inadequados de condição física, apresentando excesso de peso e adiposidade corporais, e, uma parcela importante, exibiu níveis pressóricos elevados, sugerindo elevado risco cardiovascular.AbstractObjectiveThe aim of this study was to assess the physical fitness, body composition and blood pressure of highway police officers in the state of Paraná, Brazil.MethodThe sample consisted of 52 male (38.3±6.3 years old, 89.6±18.4kg) where the following determinations were performed: body mass index (BMI); waist circumference (WC); waist/hip ratio (WHR); body composition (skinfold thickness); aerobic power (indirectly estimated in a treadmill test); muscle strength of the upper limbs was measured by the number of push-ups and abdominal strength by the number of crunches (ES) and blood pressure (measured by auscultatory method).ResultsThe highway police officers had a BMI classified as mild obesity (28.6±4.8kg/m2), and a higher cardiovascular risk as determined by WC (95.4±10.8cm) and WHR (0.92±0.05). The percentage of body fat was above the recommended values (23.6±4.3 %) but the aerobic power was considered good (34.8±1.1ml/kg/min). Mean ES upper body (21±8 repetitions) and abdomen (28±8 repetitions) were qualified as fair but mean blood pressure was considered high in 23 % of the police officers.ConclusionBased on our results it was possible to conclude that although the police officers presented good levels of aerobic power and muscle strength, they are overweight and showed a higher cardiovascular risk

MAXIMUM NUMBER OF REPETITIONS, TOTAL WEIGHT LIFTED AND NEUROMUSCULAR FATIGUE IN INDIVIDUALS WITH DIFFERENT TRAINING BACKGROUNDS

The aim of this study was to evaluate the performance, as well as neuromuscular activity, in a strength task in subjects with different training backgrounds. Participants (n = 26) were divided into three groups according to their training backgrounds (aerobic, strength or mixed) and submitted to three sessions: (1) determination of the maximum oxygen uptake during the incremental treadmill test to exhaustion and familiarization of the evaluation of maximum strength (1RM) for the half squat; (2) 1RM determination; and (3) strength exercise, four sets at 80�0of the 1RM, in which the maximum number of repetitions (MNR), the total weight lifted (TWL), the root mean square (RMS) and median frequency (MF) of the electromyographic (EMG) activity for the second and last repetition were computed. There was an effect of group for MNR, with the aerobic group performing a higher MNR compared to the strength group (P = 0.045), and an effect on MF with a higher value in the second repetition than in the last repetition (P = 0.016). These results demonstrated that individuals with better aerobic fitness were more fatigue resistant than strength trained individuals. The absence of differences in EMG signals indicates that individuals with different training backgrounds have a similar pattern of motor unit recruitment during a resistance exercise performed until failure, and that the greater capacity to perform the MNR probably can be explained by peripheral adaptations