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Resistance-type exercise (RE) elicits distinct acute metabolic and hormonal responses, which can be modulated by the manipulation of training variables. The purpose of this study was to compare the metabolic (blood lactate and estimated lactic anaerobic system energy expenditure) and hormonal (growth hormone [GH]) responses to RE sessions composed exclusively of multijoint (MULTI) or single-joint (SINGLE) exercises. Assessments of creatine kinase (CK) levels were also performed. In a crossover design, 10 recreationally resistance-trained men (age: 26.9 ± 3.0 years, total body mass: 83.2 ± 13.8 kg; height: 176 ± 7.0 cm; training experience: 5.5 ± 2.4 years) were randomly submitted to both protocols. Blood collections were made pre, 3 minutes after, and 36 hours after each experimental session. No significant difference between MULTI vs. SINGLE was observed for the rises in blood lactate (p = 0.057) and GH (p = 0.285) levels. For CK, a significant difference between the protocols was noted, in which MULTI resulted in significant rises after 3 minutes (p = 0.017) and 36 hours (p = 0.043) compared with SINGLE. In conclusion, the findings of this study suggest that resistance-trained individuals display similar metabolic and hormonal responses when performing MULTI and SINGLE exercise protocols. Also, RE sessions comprising MULTI exercises induce a higher magnitude of muscle damage, which may require a longer recovery period compared with SINGLE. [ABSTRACT FROM AUTHOR]

Oliveira JJ, Salles AHS, Barbosa CGR, Silva JAO, Dias RM, Ribeiro AGSV, Lacerda FV, Silva JM, Silva AS. Effect of Post-Activation Potentiation and Carbohydrate Mouth Rinse on Repeated Sprint Ability in University Futsal Players. JEPonline 2020;23(2):29-40. This study examined the effects of PAP, mouth rise with CHO, and the combination of both strategies on the performance of college futsal players. Fourteen subjects (age = 20.85 ± 1.46 yrs; body mass = 77.07 ± 6.94 kg; height = 1.77 ± 0.83 cm; BMI = 24.4 ± 2.60) randomly performed 8 experimental conditions before undergoing a Repeat Sprints Test (RSA, 6 sets of 40 m): (a) Placebo (PLA) (10 sec), (b) Placebo (PLA) (40 sec), (c) CHO mouth rinse (10 sec), (d) CHO mouth rinse (40 sec), (e) PAP + PLA (10 sec), (f) PAP + PLA (40 sec), (g) PAP + CHO mouth rinse (10 sec), and (h) PAP + CHO mouth rinse (40 sec). Significant interactions were observed between the Best Sprint Time experimental conditions (P<0.001), Mean Sprint Time experimental conditions (P<0.001), and Total Sprint Time experimental conditions (P<0.001). There were no significant interactions between the experimental conditions (P = 0.164) for the variable percentage of decreased performance. Thus, PAP positively affects RSA in university futsal players while the combination of PAP and CHO mouth rinse had no additional effect. [ABSTRACT FROM AUTHOR]

Sport can lead to positive effects on the athlete's personality. However, we have few studies with analyze the effects of individual and collective sports on personality, being these variables important for understanding the characteristics of the athletes and being able to offer conditions the processes of psychological intervention. The aim of the study was to evaluate the profile of individual athletes and team sports personality. 26 athletes of both genres, with 13 team sports and individual sports 13 were evaluated. The athletes were evaluated collectively by Battery Factor Personality (BFP) which is based on the model of the Big Five personality factors: neuroticism, extraversion, socialization, achievement and openness. The results revealed no significant differences between the two sports athletes in neuroticism factors (p=0.20), extraversion (p=0.28), socialization (p=0.35) and openness (p=0.15). There was a significant difference in satisfaction (p=0.03) factor, with the highest average for team sports athletes. We conclude that team sport athletes demonstrate differences and higher achievement level. [ABSTRACT FROM AUTHOR]

The aim of this study was to analyze the effect of different intensities of PAP on vertical jump performance in university volleyball players. Twelve players performed anthropometric tests, 1 RM (repetition maximum) test in the squatting exercise, and familiarization with the vertical jump test. In subsequent weeks, the subjects underwent 5 more collection sessions with a 24-hr rest interval between them. Prior to each Counter Movement Jump (CMJ) test, the subjects performed an experimental condition: (a) Control; (b) PAP 91% 1RM; (c) PAP 85% 1RM; (d) PAP 70% 1RM; and (e) PAP 60% 1RM. The results showed that the Group submitted to the PAP protocol showed a significant difference in comparison to the Control Group, with higher PAP intensities of 91%, 85%, and 70% of 1 RM verified while the 60% intensity of 1RM showed no significant difference in comparison to the Control Group. The findings indicate that the PAP positively affects the performance of vertical jump in university volleyball players. [ABSTRACT FROM AUTHOR]

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Background: Short sprint is an important physical ability that determines the success in various sports modalities and may influence different conditioning activities. Postactivation potentiation (PAP) is a conditioning method used in practicing sports, which can result in acute improvements in muscle power and performance by interaction of physiological and neural mechanisms. Objectives: The current study aimed at investigating the effect of PAP on a sprint of less than 40 meters. Methods: A systematic review and meta-analysis was conducted on the randomized, controlled studies. The search was conducted in several databases (PubMed,Web of Science, Cochrane, and Science Direct) using the following keywords: "Postactivation Potentiation", "Sprint", and "Complex Training and Sprint". The sprint time data (mean and standard deviation) of the selected studies were analyzed using the OpenMeta (Analyst)® program. Data were expressed as weightedmean differences (WMD) between the groups with 95% confidence interval (95% CI). The level of significance was P < 0.05. Results: A total of 1859 records were initially identified out of which 15 studies were selected according to the inclusion criteria and included in the current study. The meta-analysis results showed a positive effect of PAP on sprint time in the distance 0 to 10 meter (WMD = -0.031 seconds, 95% CI: -0.050, -0.012, P = 0.001), 11 to 20 meter (WMD = -0.048 seconds, 95% CI: -0.089, -0.007, P = 0.021), 21 to 30 meter (WMD = -0.060 seconds, 95% CI: -0.094, -0.026; P < 0.001), and 31 to 40 meter (WMD = -0.109 seconds, 95% CI = -0.141, -0.077, P < 0.001). Conclusion: In summary, PAP induced positive effects on short sprint performances. [ABSTRACT FROM AUTHOR]

The purpose of this study was to investigate the influence of CHO mouth rinse on sprint performance during cycle ergometer and running tests. A systematic review and meta-analysis of randomized controlled studies were developed. The survey was conducted using the following databases: PubMed, SciELO, Cochrane and Science Direct using the keywords: "carbohydrate mouth rinse" AND "sprint". The search identified 41 articles of which 6 articles met the inclusion/exclusion criteria. The results of the meta-analysis indicate that CHO mouth rinse had no significant effect (P>0.05) on the peak power (weighted mean difference [WMD] = 0.089 W·kg-1; 95% confidence interval [CI] = -0.823, 0.645) and mean power (WMD = 0.006; 95% CI = -0.365, 0.352) in the cycle ergometer test. In addition, no significant difference (P>0.50) in the sprint running time (WMD = 0.009 sec; 95% CI = -0.068, 0.050) was observed. In conclusion, CHO mouth rinse does not influence short sprint performance. [ABSTRACT FROM AUTHOR]