Luiz Fernando de Farias Junior

Feeling of pleasure to high-intensity interval exercise is dependent of the number of work bouts and physical activity status

Objectives To examine the affective responses during a single bout of a low-volume HIIE in active and insufficiently active men. Materials and methods Fifty-eight men (aged 25.3 ± 3.6 years) volunteered to participate in this study: i) active (n = 29) and ii) insufficiently active (n = 29). Each subject undertook i) initial screening and physical evaluation, ii) maximal exercise test, and iii) a single bout of a low-volume HIIE. The HIIE protocol consisted of 10 x 60s work bouts at 90% of maximal treadmill velocity (MTV) interspersed with 60s of active recovery at 30% of MTV. Affective responses (Feeling Scale, -5/+5), rating of perceived exertion (Borg’s RPE, 6–20), and heart rate (HR) were recorded during the last 10s of each work bout. A two-factor mixed-model repeated measures ANOVA, independent-samples t test, and chi-squared test were used to data analysis. Results There were similar positive affective responses to the first three work bouts between insufficiently active and active men (p > 0.05). However, insufficiently active group displayed lower affective responses over time (work bout 4 to 10) than the active group (p < 0.01). Also, the insufficiently active group displayed lower values of mean, lowest, and highest affective response, as well as lower values of affective response at the highest RPE than the active group (p < 0.001). There were no differences in the RPE and HR between the groups (p > 0.05). Conclusions Insufficiently active and active men report feelings of pleasure to few work bouts (i.e., 3–4) during low-volume HIIE, while the affective responses become more unpleasant over time for insufficiently active subjects. Investigations on the effects of low-volume HIIE protocols including a fewer number of work bouts on health status and fitness of less active subjects would be interesting, especially in the first training weeks.

Slow Down and Enjoy: The Effects of Cycling Cadence on Pleasure.

Pleasure plays a key role in exercise behavior. However, the influence of cycling cadence needs to be elucidated. Here, we verified the effects of cycling cadence on affect, perceived exertion (ratings of perceived exertion), and physiological responses. In three sessions, 15 men performed a maximal cycling incremental test followed by two 30-min constant workload (50% of peak power) bouts at 60 and 100 r/min. The pleasure was higher when participants cycled at 60 r/min, whereas ratings of perceived exertion, heart rate, and oxygen uptake were lower (p < .05). Additionally, the rate of decrease in pleasure and increase in ratings of perceived exertion was less steep at 60 r/min (p < .01). Cycling at 60 r/min is more pleasant, and the perceived effort and physiological demand are lower than at 100 r/min.

A Single Session of Low-Volume High-Intensity Interval Exercise Reduces Ambulatory Blood Pressure in Normotensive Men

Abstract Dantas, TCB, Farias Junior, LF, Frazão, DT, Silva, PHM, Sousa Junior, AE, Costa, IBB, Ritti-Dias, RM, Forjaz, CLM, Duhamel, TA, and Costa, EC. A single session of low-volume high-intensity interval exercise reduces ambulatory blood pressure in normotensive men. J Strength Cond Res 31(8): 2263–2269, 2017—The magnitude and duration of postexercise hypotension (PEH) may provide valuable information on the efficacy of an exercise approach to blood pressure (BP) control. We investigated the acute effect of a time-efficient high-intensity interval exercise (HIIE) on ambulatory BP. Twenty-one normotensive men (23.6 ± 3.6 years) completed 2 experimental sessions in a randomized order: (a) control (no exercise) and (b) low-volume HIIE: 10 × 1 minute at 100% of maximal treadmill velocity interspersed with 1 minute of recovery. After each experimental session, an ambulatory BP monitoring was initiated. Paired sample t-test was used to compare BP averages for awake, asleep, and 20-hour periods between the control and the low-volume HIIE sessions. A 2-way repeated measures analysis of variance was used to analyze hourly BP after both experimental sessions. Blood pressure averages during the awake (systolic: 118 ± 6 vs. 122 ± 6 mm Hg; diastolic: 65 ± 7 vs. 67 ± 7 mm Hg) and 20-hour (systolic: 115 ± 7 vs. 118 ± 6 mm Hg; diastolic: 62 ± 7 vs. 64 ± 7 mm Hg) periods were lower after the low-volume HIIE compared with the control (p ⩽ 0.05). Systolic and diastolic PEH presented medium (Cohens d = 0.50–0.67) and small (Cohens d = 0.29) effect sizes, respectively. Systolic PEH occurred in a greater magnitude during the first 5 hours (3–5 mm Hg). No changes were found in asleep BP (p > 0.05). In conclusion, a single session of low-volume HIIE reduced ambulatory BP in normotensive men. The PEH occurred mainly in systolic BP during the first 5 hours postexercise.

Percepção subjetiva do esforço, resposta afetiva e hipotensão pós-exercício em sessão de Tai Chi Chuan

The aim of the study was to analyze the rating of perceived exertion (RPE), affective response (AR), and blood pressure (BP) post-exercise in acute Tai Chi Chuan (TCC) session. Twenty-four women (47-79 years; 9 normotensive and 15 hypertensive) performed one TCC and one control session (cross-over design). The RPE was assessed using the Borgs scale (CR10), the AR was assessed by the Feeling Scale (+5/-5) and the BP by the oscillometric method (5, 10, 15, 20, 25, and 30min post-TCC session). A significant systolic BP reduction was observed in the 20 and 25min post-TCC session only in the hypertensive women. The AR and RPE values were +2.8 ± 1.9 e 3.5 ± 1.2, respectively. The results suggest that a moderate TCC exercise bout was pleasurable for the volunteers (normotensive and hypertensive), although it has induced a slight acute hypotensive effect on the systolic BP only in the hypertensive women.

EFEITO DO ESFORÇO FÍSICO NO DESEMPENHO DE TIRO DE POLICIAIS MILITARES DO BATALHÃO DE CHOQUE

ABSTRACT Introduction: The use of firearms by military police officers is usually preceded by pursuit on foot, and the physiolog -ical changes produced by physical exertion may affect shooting performance. Objective: To verify the effect of physical effort on shooting performance in military police officers. Methods: The sample consisted of 15 men (34.1 ± 5.4 years; 81.4 ± 8.8 kg; 171.3 ± 5.6 cm; 27.7 ± 2.3 kg/m²; 44.9 ± 4.0 ml.kg -1 .min -1 ) of the riot police. In the first session, the subjects performed a maximal treadmill stress test in which the peak oxygen consumption (VO 2peak ) was measured. In the second session, shooting performance (score) and shooting time were measured pre and post-exercise, as well as the time spent to complete a circuit of obstacle running (297 m). Shooting efficiency index was calculated as the ratio between total score and shooting time. The Shapiro-Wilk test confirmed the normal distribution of the data. A paired t-test was used to compare the post-exertion outcomes variables as well as the Pearson correlation coefficient. Results: The time to complete the running circuit was 75.3 ± 4.4 s. Shooting performance (20.4 ± 11.4 vs. 17.6 ± 9.3 points), time (4.48 ± 1.1 vs. 4.23 ± 0.9 s), and efficiency (4.69 ± 2.7 vs. 4.35 ± 2.7 pts/s) did not present significant differences (P>0.2). Additionally, a correlation was detected between VO