The effects of low-intensity resistance exercise (RE) combined with blood flow restriction (BFR) on blood pressure (BP) are an important factor to be considered because of the acute responses imposed by training. The aim of this study was to compare the hypotensive effect of RE performed with and without BFR in normotensive young subjects. After 1 repetition maximum (1RM) tests, 24 men (21.79 ± 3.21 years; 1.72 ± 0.06 m; 69.49 ± 9.80 kg) performed the following 4 experimental protocols in a randomized order: (a) high-intensity RE at 80% of 1RM (HI), (b) low-intensity RE at 20% of 1RM (LI), (c) low-intensity RE at 20% of 1RM combined with partial BFR (LI + BFR), and (d) control. Analysis of systolic blood pressure (SBP) and diastolic blood pressure (DBP) was conducted over a 60-minute period. The 3 RE protocols resulted in hypotensive SBP (HI = -3.8%, LI = -3.3%, LI + BFR = -5.5%) responses during the 60 minutes (p ≤ 0.05). The LI + BFR protocol promoted hypotensive (-11.5%) responses in DBP during the 60 minutes (p ≤ 0.05), and both the HI and LI + BFR protocols resulted in mean blood pressure (MBP) hypotension between 30 (-7.0%, -7.7%) and 60 minutes (-3.6%, -8.8%), respectively. In conclusion, postexercise hypotension may occur after all 3 exercise protocols with greater reductions in SBP after HI and LI + BFR, in DBP after LI + BFR, and in MBP after HI and LI + BFR protocols.

Ferreira, C.; Aidar, F.; Novaes, G.; Vianna, J.; Carneiro, A.; Menezes, L.; O método Pilates ® sobre a resistência muscular localizada em mulheres adultas. Motricidade 3(4): 76-81

The current study aimed to compare the effects of two exercise programs (Strength Training and Hydro Gymnastics) on the functional and cardiorespiratory abilities of Portuguese postmenopausal women. The study population consisted of 38 volunteers (age: 66.9 ± 6.1 years, body mass: 73.70 ± 10.38 kg, and body height: 1.55 ± 0.10 m). Subjects were randomly divided into two experimental groups and one control group: one group performed 24 weeks of strength training (GST; n = 14), another performed 24 weeks of hydro gymnastics (GH; n = 17) and a control group (CG; n = 7), where the subjects continued with their regular daily activities without involvement in any physical exercise program. Three assessments were performed: before the beginning of the program, 12 weeks after the start of the training program and 24 weeks after the start of the program. To assess the functional ability of the participants, several tests proposed by Jones and Rikli (2002) were performed. To evaluate the cardiorespiratory ability of the participants, a modified treadmill Bruce test was applied. Significant differences (p<0.05) were found between the two training methods in the tests, which primarily demanded muscular strength. Body mass and the body mass index showed significant differences during the three stages of assessment in the GST group (p<0.05). With respect to the values that represent the variables of cardiorespiratory ability, positive and significant changes were observed in the two experimental groups. It was concluded that both exercise programs promoted improvements in some indicators of the functional and cardiorespiratory abilities of Portuguese postmenopausal women.

Abstract--The aim of this study was to compare the acute effects of low-intensity (LI) resistance exercise (RE) with continuous blood flow restriction (CBFR) and intermittent blood flow restriction (IBFR) on systolic blood pressure (SBP), diastolic blood pressure (DBP), and mean arterial pressure (MAP). After a one-repetition maximum test, 10 normotensive recreationally trained men performed three experimental protocols. In the three RE protocols, increases in SBP, DBP, and MAP were observed immediately after exercise, but the effect sizes (ESs) were greater for the LI + CBFR and high-intensity protocols. There were hypotensive effects on SBP, DBP, and MAP in all three protocols; however, the effects on MAP lasted longer for the LI + IBFR and LI + CBFR protocols. These long-lasting hypotensive effects on DBP and MAP occurred in all three protocols. Thus, we conclude that the post exercise hypotensive effects on SBP, DBP, and MAP appear to occur in all three RE protocols, with the effect on SBP being longer in the LI + IBFR and LI + CBFR protocols.

Este experimento investigou a Influência de diferentes ordens de exercícios resistidos (ER) em uma sessão para peitorais e tríceps sobre o número de repetições máximas (RM). Participaram 13 homens treinados (23,8±2,5 anos; 76,5± ±12 kg; 178,5±6,3 cm). Os dados foram coletados em duas fases: (a) determinação da carga para 8RM no: supino reto (SR), supino inclinado (SI) e supino declinado (SD), tríceps no pulley (TP) e tríceps na testa (TT) e (b) execução de três séries com cargas para 8RM, três minutos de intervalo entre séries, cinco minutos entre exercícios, em duas seqüências, a saber: (SEQ1) SR, SI, SD, TP e TT; (SEQ2) TT, TP, SD, SI, e SR. Foi utilizado o teste t pareado para verificar a diferença entre os números totais de RM produzidos entre seqüências. ANOVA two-way no número de RM produzidos em cada exercício entre sequências. ANOVA one-way para comparar o número de RM por série dentro de cada sequência. Para identificar estas diferenças foi utilizado o post hoc de Tukey. A significância adotada, p<0,05. O número total de RM não apresentou diferenças significativas entre as sequências. A média do número de RM por exercício foi menor quando o mesmo foi realizado no final da sequência.Palavras-chave: treinamento de força, exercícios resistidos, desempenho, força, ordem dos exercícios. Acute influence of the resistance exercise order in a training session for chest and tricepsThis experiment investigated the Influence of different resistance exercise order in a training session for chest and triceps on the number of maximum repetitions (RM). Thirteen trained men participated in the experiment (23.8±2.5 years; 76.5±12 kg; 178.5±6.3 cm). Data were collected in two phases: (a) determination of a 8RM load in the: bench press (BP), incline bench press (IBP), decline press (DP), triceps pushdown (TP) and triceps extension (TE), and (b) execution of 3 sets with loads for 8RM, three minutes of interval between sets, five minutes among exercises, in two sequences, to know: (SEQ1); BP, IBP, DP, TP, and TE (SEQ2) TE, TP, DP, IBP, and BP. The paired test t was used to verify the difference between the total numbers of RM produced between sequences. ANOVA two-way was used to verify the differences in the number of RM in each exercise among the sequences. ANOVA one-way to compare the number of RM for set inside the sequences. To identify these differences the post hoc of Tukey was used. Level significance adopted p<0.05. The total number of RM didn't present significant differences among the sequences. The average number of RM for exercise was smaller when the same was accomplished in the end of the sequence.Keywords: strength training, resistance exercise, performance, strength, exercise order. Resumo Abstract