Rodrigo Ramalho Aniceto

Effects of High-Intensity Blood Flow Restriction Exercise on Muscle Fatigue

Abstract Strength training combined with blood flow restriction (BFR) have been used to improve the levels of muscle adaptation. The aim of this paper was to investigate the acute effect of high intensity squats with and without blood flow restriction on muscular fatigue levels. Twelve athletes (aged 25.95 ± 0.84 years) were randomized into two groups: without Blood Flow Restriction (NFR, n = 6) and With Blood Flow Restriction (WFR, n = 6) that performed a series of free weight squats with 80% 1-RM until concentric failure. The strength of the quadriceps extensors was assessed in a maximum voluntary isometric contraction integrated to signals from the surface electromyogram. The average frequency showed significant reductions in the WFR group for the vastus lateralis and vastus medialis muscles, and intergroup only for the vastus medialis. In conclusion, a set of squats at high intensity with BFR could compromise muscle strength immediately after exercise, however, differences were not significant between groups.

Treinamento de sobrecarga muscular não afeta o diâmetro das principais veias dos membros inferiores em mulheres adultas com insuficiência venosa

Physical exercise can promote benefits in the functionality of the venous system. However, in the strength training context, contraindication concerning its practice is observed, since it can be related to worsening of venous dysfunctions. OBJECTIVE: To analyze the effects of resistance exercises practice on venous diameter of physical inactivity women with chronic lower limb venous insufficiency. METHODS: Twenty-two women with age between 21 and 58 years (34.27 ± 12 years) were randomized divided in two groups: experimental (n = 12) and control (n = 10). The resistance training was carried out over a period of 16 weeks and the venous diameter measurements were determined at the left lower limb Great and Small saphenous veins by a color Eco- Doppler. Two-way ANOVA was used to determine the modifications in veins diameter between groups and training moments (pre and post) (p < 0.05). RESULTS: Statistically significant alterations were not found in smaller saphenous vein diameter (upper, medium and lower points: p = 0.80; 0.32 and 0.20, respectively), great saphenous vein on leg level (p = 0.17; 0.74 and 0.96) and great saphenous vein on thigh level (p = 0.57; 0.67 and 0.52). CONCLUSION: Resistance exercise practice can be considered a treatment or intervention since it does not promote changes on the venous diameter of the venous system of women with chronic lower limb venous insufficiency.

Efeitos agudos de diferentes métodos de treinamento com pesos sobre o gasto energético em homens treinados

INTRODUCTION: The weight training has been widely used as strategy of reduction and weight control, so the energy expenditure (EE) contributes significantly to this process. OBJECTIVE: Compare the acute effects of the circuit method (CM) with the traditional method (TM) on the EE. METHODS: This is a research with randomized crossover design; the sample consisted of ten adult men recreationally trained aged between 18 to 29 years. There were two experimental sessions with seven-day wash out: in CM the exercises were performed by alternating segment in form of stations, during TM the exercises were performed in consecutive sets. Both training methods followed the same sequence of eight exercises with the same total work: 60% of 1RM, 24 sets/stations and ten repetitions. The collection of blood lactate was performed at rest and the every three sets/stations. The expired air was collected per 30 minutes before and ~31 minutes during all the training sessions. The aerobic exercise (AEEE, kj) and of rest interval (RIEE, kj) EEs were estimated by indirect calorimetry by measuring oxygen consumption and the anaerobic EE (AEE, kj) by blood lactate concentration ([La]). The total EE (TEE, kj) was recorded by the sum of AEE, RIEE and AEE. RESULTS: Data showed that the AEE was greater in TM than the CM; however, the AEEE, RIEE and the TEE were not significantly different between the methods. The TM presented higher [La] than the CM. CONCLUSION: We conclude that the CM and TM produces similar EE during and post-workout, however, one realizes that the TM uses more anaerobic system than the MC.

Rating of Perceived Exertion During Circuit Weight Training: A Concurrent Validation Study.

Abstract Aniceto, RR, Ritti-Dias, RM, dos Prazeres, TMP, Farah, BQ, de Lima, FFM, and do Prado, WL. Rating of perceived exertion during circuit weight training: A concurrent validation study. J Strength Cond Res 29(12): 3336–3342, 2015—The aim of this study was to determine whether rating of perceived exertion (RPE) is a valid method to control the effort during the circuit weight training (CWT) in trained men. Ten men (21.3 ± 3.3 years) with previous experience in resistance training (13.1 ± 6.3 months) performed 3 sessions: 1 orientation session and 2 experimental sessions. The subjects were randomly counterbalanced to 2 experimental sessions: CWT or multiple-set resistance training (control). In both sessions, 8 exercises (bench press, leg press 45°, seated row, leg curl, triceps pulley, leg extension, biceps curl, and adductor chair) were performed with the same work: 60% of 1 repetition maximum, 24 stations (3 circuits) or 24 sets (3 sets/exercise), 10 repetitions, 1 second in the concentric and eccentric phases, and rest intervals between sets and exercise of 60 seconds. Active muscle RPEs were measured after each 3 station/sets using the OMNI-Resistance Exercise Scale (OMNI-RES). In this same time, blood lactate was collected. Compared with baseline, both levels of blood lactate and RPE increased during whole workout in both sessions, the RPE at third, 23rd, and 27th minute and the blood lactate at third, seventh, 11th, 15th, 27th, and 31st minute were higher in multiple set compared with CWT. Positive correlation between blood lactate and RPE was observed in both experimental sessions. The results indicated that the RPE is a valid method to control the effort during the CWT in trained men and can be used to manipulate the intensity without the need to perform invasive assessments.

Is there a difference between the lifestyle of hypertensive adults and elderly in the Family Health Program

Consequences of negative lifestyle behaviors may be different between adults and elderly, especially for hypertensive individuals. Therefore, this study compared the lifestyle of a group of hypertensive adults and elderly enrolled in the Family Health Program (FHP) of the city of Patos-PB. In a descriptive and cross-sectional study, 97 hypertensive patients of both sexes were randomly selected from FHPs and divided based on the age into two groups: Adults (<60 years, n= 44) and Elderly (≥60 years, n= 53). Lifestyle was assessed by the Individual Lifestyle Profile Scale (ILPS) composed of five components: Nutrition, Physical Activity, Preventive Behavior, Social Relationship and Stress Control. Each component was classified as negative (≤3 points) or positive (≥4 points). The ILPS scores were compared between the groups by the Mann-Whitney U test. Associations between component profiles and age groups were verified using the Chi-square test. Results showed that the Elderly presented a higher proportion of positive ILPS compared to Adults (P≤ 0.05), respectively, for Nutrition (n= 42, 79.2% vs. n= 26, 59.1%) and for Social Relationship (n= 49, 92.5% vs. n= 34, 77.3%). It is concluded that the Elderly were more conducive to a healthier lifestyle than the Adults. Because both age groups present a predominance of a negative profile in Physical Activity, it is suggested that the subjects adhere to the practice of physical exercise as a non-drug treatment, reducing the risk factors associated with hypertension.

Development and Validation of an Automated Step Ergometer

Abstract Laboratory ergometers have high costs, becoming inaccessible for most of the population, hence, it is imperative to develop affordable devices making evaluations like cardiorespiratory fitness feasible and easier. The objective of this study was to develop and validate an Automated Step Ergometer (ASE), adjusted according to the height of the subject, for predicting VO2max through a progressive test. The development process was comprised by three steps, the theoretical part, the prototype assembly and further validation. The ASE consists in an elevating platform that makes the step at a higher or lower level as required for testing. The ASE validation was obtained by comparing the values of predicted VO2max (equation) and direct gas analysis on the prototype and on a, treadmill. For the validation process 167 subjects with average age of 31.24 ± 14.38 years, of both genders and different degrees of cardiorespiratory fitness, were randomized and divided by gender and training condition, into untrained (n=106), active (n=24) and trained (n=37) subjects. Each participant performed a progressive test on which the ASE started at the same height (20 cm) for all. Then, according to the subject’s height, it varied to a maximum of 45 cm. Time in each stage and rhythm was chosen in accordance with training condition from lowest to highest (60-180 s; 116-160 bpm, respectively). Data was compared with the student’s t test and ANOVA; correlations were tested with Pearson’s r. The value of α was set at 0.05. No differences were found between the predicted VO2max and the direct gas analysis VO2max, nor between the ASE and treadmill VO2max (p= 0.365) with high correlation between ergometers (r= 0.974). The values for repeatability, reproducibility, and reliability of male and female groups measures were, respectively, 4.08 and 5.02; 0.50 and 1.11; 4.11 and 5.15. The values of internal consistency (Cronbach’s alpha) among measures were all >0.90. It was verified that the ASE prototype was appropriate for a step test, provided valid measures of VO2max and could therefore, be used as an ergometer to measure cardiorespiratory fitness.