Suliane Beatriz Rauber

Traditional games resulted in post-exercise hypotension and a lower cardiovascular response to the cold pressor test in healthy children.

The present study aimed to verify if blood pressure (BP) reactivity could be reduced through a previous single session of active playing when compared to sedentary leisure. Sixteen pre-pubertal healthy children participated in this study. After familiarization with procedures and anthropometric evaluation, participants performed three sessions in randomized order: (1) 30 min of traditional Brazilian games (PLAY); (2) 30 min of video game playing (DDR); and (3) 30 min of watching TV (TV). Each session lasted 80 min, being 10 min of rest; 30 min of intervention activity; and 40 min of recovery. After recovery, the Cold Pressor Test (CPT) was used for the assessment of acute cardiovascular reactivity. BP was recorded at 30 s and 1 min during the CPT. Analysis of variance showed post-exercise hypotension (PEH) only after PLAY, and that systolic and diastolic BP were significantly increased in all conditions during CPT. However, the magnitude of the CPT-induced BP response was significantly less in PLAY compared to DDR and TV. The PEH observed during recovery and the reduced BP response to CPT following playing traditional games may be due its higher cardiovascular and metabolic demand as was indicated by the increased heart rate, oxygen consumption, and BP. It was concluded that BP reactivity to stress may be reduced through a previous single session of traditional games and that PEH was recorded only after this exercise form. This benefit indicates a potential role of playing strategies for cardiovascular health in childhood.

Variáveis cardiovasculares durante e após a prática do VÍDEO GAME ativo "Dance Dance Revolution" e televisão

Abstract: Cardiovascular diseases (CVDs) are the leading cause of death worldwide and the pathological processes associated with their development in the early childhood. The objective of this study was to investigate the cardiovascular responses during and after the practice of video game interactive and television. The sample consisted of eight healthy children (9.8 ± 0.5 years, 30.1 ± 3.4 kg, 133.3 cm ± 13.6, 17.4 ± 4.7 kg/m 2 ). The study consisted of three sessions, where the 1st was FAM – for anthropometric measurement and procedures familiarization, and the other sessions, were performed in randomized order; DDR - Dance Dance Revolution: the volunteers realized 30 min in the beginner level; TV - 30 min watching a children’s cartoon (Ben 10 and Sponge Bob). The heart rate (HR), systolic (SBP) and diastolic (DBP) blood pressure were measured at rest and during the 10th, 20th and 30th minutes of activity and recovery in the 2nd 10th, 20th, 30th and 40th min. Statistical analysis was checked for normal distribution of data by Kolgomorov-Smirnov test, ANOVA, one-way MANOVA with post hoc Scheffe for comparison between sessions, ANOVA repeated measures, comparing the times of each session. The significance level was p ≤ 0.05 (ESTATISTICA 6.0). The results show a significant rise in HR, SBP and MAP during the DDR (30min: 110bpm, 116.3 and 89.6 mmHg) compared to the TV (30min: 86.7 bpm, 102 mmHg and 70.3mmHg). There was a downward trend in HR and SBP at 40 min of recovery after session DDR, as well as an upward trend in HR, SBP, DBP, and MAP after TV when compared to the rest, but these were not significant (p>0,05). We conclude that video game is an interesting alternative of active playing, which might bring cardiovascular benefits. If these BP values be maintained throughout the day during childhood, we may expect a better health during adulthood what, in turn, may be important for public health.

Reprodutibilidade do protocolo de lactato mínimo com intensidade do esforço prévio individualizado pela PSE

Abstract: The lactate minimum protocol (LM) is preceded by a maximum effort to induce hyperlactatemia. Objective: To verify the reliability of LM test with induced hyperlactatemia realized by exercise intensity individualized by the rating perceived effort (RPE). Methods: The sample was composed of 20 students, physically active (25.4 ± 4.1 years, 14.1 ± 5.0% fats) who were undertaken to two tests with identical methodology of LM. Induction of hyperlactatemia was performed by a test with four stages, lasting three minutes each, loads individualized by the PSE (levels 10, 13, 16 and 17-20 last stage until voluntary exhaustion). After eight minutes of recovery the progressive test started with initial load of 75W and 25W increments every 3 min until exhaustion. Results: The intensities of LM 1 (155.0 ± 23.8 W) and 2 (157.5 ± 27.0 W) did not differ statistically (p = 0.795) and showed good reliability (ICC = 0.79) and agreement [-2.5 W of mean difference and ± 41.8 W of bias]. Conclusion: The LM test, with loads for induction of hyperlactatemia individualized by the RPE, has shown to be reliable in physically active individuals.

Effects of a physical activity and nutritional intervention in overweight and obese children through an educational and recreational camp

Background: Educational camps have hosted millions of children around the world. However, few studies have described their benefits on weight control and health promotion for overweight and obese children. Aim: To investigate the impact of a health educational program for children composed of 5 days of camp and a 12-week follow up on the physical activity level, sedentary behaviour, anthropometric data and food intake in overweight and obese children. Methods: 12 children attended the Health Educational Program for Children divided into two phases. Phase 1 consisted of pre-assessments and Phase 2 corresponded to 12 weeks of follow up. Physical activity level, sedentary behaviour and food intake were assessed throughout the questionnaire. Results: After the follow up, 25% of the children became active (>1500 and <3000 Metabolic Equivalent of Tasks per week). In contrast, the number of sedentary children (<600 Metabolic Equivalent of Tasks per week) decreased by 15% and insufficiently active (600–1500 Metabolic Equivalent of Tasks per week) increased by 15%. The physical activity level of leisure time increased significantly throughout weekdays (26.0%) and weekends (14.1%) after the follow up compared to before the camp. Sedentary behaviour showed a significant reduction of 177.14 and 41.43 minutes on weekdays and weekends, respectively. Before the camp, the consumption of sugar and sweets was out of control (100% inadequate), and after the intervention, 58.4% started to consume these foods in a balanced way. Conclusions: The Health Educational Program for Children (5-day camp and the 12 weeks of follow up) contributed to an increase in the physical activity level and a reduction in the sedentary behaviour and anthropometric measures in overweight and obese children.

Recording daily routines with guidance on healthy lifestyle to improve health parameters in children and their families

This study investigated the efficacy of using a diary to record daily routines, combined with guidance on healthy lifestyle (GHL) by a physical educator, on promoting changes in health parameters in children. Sixty-three children (10 ± 0.8 years) were allocated to one of the three following groups: a control group (CON, n = 18); a group that did not use the diary, but received GHL (G, n = 23); or a group that both used the diary and received GHL (DG, n = 22). Blood pressure, body composition, physical fitness tests (PF), physical activity levels (PAL), and dietary intake profiles were assessed in children and their parents before and after 2 months of intervention. The DG group improved their performance in PF, increased PAL, and reduced body fat (p < 0.05). Additionally, 56% of families from both DG and G reduced their consumption of unhealthy foods and 70,6% increased their consumption of healthy foods. Overall, it was concluded that 2 months of using a diary to record daily routines combined with GHL by a physical educator improved PAL, PF, body composition, and dietary intake profiles of children and their families.

Consumo de oxigênio de pico em idosas: comparação entre valores medidos e previstos

The purpose of this study was to compare the peak oxygen uptake (VO2peak) measured through stress testing and those obtained by predictive equations. A total of 116 elderly women (mean age 66.7 ± 5.8 years) were submitted to a cardiopulmonary exercise test in treadmill (ramp protocol). In addition, VO2peak values were estimated through the American College of Sports Medicine (ACSM) and Foster equations. Measured and estimated values were compared using repeated measures ANOVA. Correlation between methods was examined using Pearson coefficient and agreement using Bland and Altman plot. Both ACSM and Foster equations significantly overestimated measured VO2peak (p<0.001; mean of 6.9 and 2.7 ml.kg-1.min-1, respectively). The ACSM equation generated greater values than the Foster equation. Positive and significant correlation was observed between measured and estimated values (r = 0.70; p<0.01), while age was negatively correlated with measured VO2peak (r = -0.31; p=0.001). Findings show that for the elderly, equations commonly used overestimate VO2peak measured by cardiopulmonary exercise test, pointing to caution during classification of cardiorespiratory fitness.