Effect of Overload and Tapering on Individual Heart Rate Variability, Stress Tolerance, and Intermittent Running Performance in Soccer Players During a Preseason.

Figueiredo, DH, Figueiredo, DH, Moreira, A, Gonçalves, HR, and Stanganelli, LCR. Effect of overload and tapering on individual heart rate variability, stress tolerance, and intermittent running performance in soccer players during a preseason. J Strength Cond Res 33(5): 1222-1231, 2019-This study evaluates the weekly natural log of the root-mean-square difference of successive R-R intervals (lnRMSSDmean), its coefficient of variation (lnRMSSDcv), training load (TL), stress tolerance (ST), and changes in intermittent running performance in response to a 2-week overload (OL) followed by a 1-week taper (TP) during a preseason.

Venous versus capillary sampling for total creatine kinase assay: Effects of a simulated football match.

Background: Capillary rather than venipuncture may be a simpler and less invasive blood collection protocol that would increase the number of potential sampling tests. However, if capillary sampling can be used as an alternative to venipuncture to determine changes in plasma, total creatine kinase (CK) activity in response to a football training session is poorly known.

Objective: This study aims to determine whether capillary blood sampling would provide representative measures of total CK activity compared to venipuncture in response to a football training session-induced elevated CK plasma levels.

Tracking of body adiposity indicators from childhood to adolescence: Mediation by BMI.

Our aim was to verify the tracking of body adiposity indicators from childhood to adolescence and analyze the mediation effects of BMI on the stability of body adiposity. Our sample was composed by 375 children (197 boys). The children were followed-up over 3 years.

Performance indicators analysis at Brazilian and Italian women's volleyball leagues according to game location, game outcome, and set number.

This study was done to investigate the advantage of playing at home in elite women's volleyball leagues and the influence of performance indicators in the game score according to set number. The sample consisted of 240 games of the Brazilian Volleyball League (n = 132 games) and the Italian Volleyball League (n = 108 games) from the 2011-2012 season. The relationship of performance indicators (including serve, attack, block, and opponents' errors) with the game outcome (win or lose) was assessed.

Adaptations on jump capacity in Brazilian volleyball players prior to the under-19 World Championship.

The under-19 Brazilian volleyball national team has achieved great performances at international competitions. Because the vertical jump capacity is critical for success in volleyball, the purpose of this study was to identify the training-induced adaptations on jump capacity assessed by general and specific tests during 3 different moments (i.e.

[Cardiovascular risk factors in adolescents: biological and behavioral indicators].

Objective: To provide descriptive information and investigate to what extent behavioral risk factors for cardiovascular diseases are associated with biological risk factors in the young population.

Methods: The sample included 452 adolescents (246 girls and 206 boys) between 15 and 18 years of age selected in a high school in the city of Londrina, Paraná. Risk factors of a behavioral nature were analyzed as regards insufficient physical activity, excessive intake of fat and cholesterol and smoking.