Gustavo Henrique Rigo Vanevazzi

Bio: Gustavo Henrique Rigo Vanevazzi is an academic researcher from Federal University of São Carlos. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

Estudo do comportamento cortisol, gh e insulina apos uma sessao de exercicio resistido agudo

Abstract: INTRODUCAO: Muitos trabalhos tem estudado o comportamento hormonal nos exercicio resistido, entretanto poucos relacionam os hormonios cortisol, GH e insulina. OBJETIVO: Estudar os ajustes das concentracoes plasmaticas dos hormonios cortisol, GH e insulina em exercicios resistidos de mesma intensidade com relacao a massas musculares distintas. METODOS: Dez voluntarios, com 20,3 ± 4,2 anos, 74,1 ± 10,2 kg de peso, 177,2 ± 4,6 cm de estatura e 23,8 ± 3,2 kg/m2 de IMC, realizaram uma sessao de leg press (LP) e supino reto (SR) com quatro series com 10 repeticoes a 70% 1 RM com tres minutos de intervalo. Foram coletadas amostras de sangue para dosagem das concentracoes plasmaticas de cortisol, GH e insulina em repouso (Pre) e em 0' (Rec. 0'), 30' (Rec. 30') e 90' (Rec. 90') de recuperacao. RESULTADOS: As concentracoes plasmaticas de cortisol foram significativamente reduzidas ao final da recuperacao em LP (2,20±0,37 ng/dl para 1,33±0,38ng/dl) em relacao a pre-dosagem. As concentracoes de GH e insulina elevaram-se significativamente durante a recuperacao. GH em LP foi significativamente maior em Rec. 0' (2,75±3,29 ng/ml para 9,60±5,32 ng/dl) do que em pre. A insulina elevou-se significativamente em Rec. 30' em LP (14,70±7,92 ulU/ml para 21,66 ± 8,61 ulU/ml) e em SR (6,17 ± 2,99 ulU/ml para 19,70 ± 13,8 ulU/ml) em relacao a pre. As concentracoes plasmaticas de insulina pre em LP foram significativamente superiores a SR (14,70 ulU/ml e 6,17 ± 2,99 ulU/ml). CONCLUSAO: O exercicio resistido promoveu diferentes ajustes nas concentracoes hormonais de cortisol, GH e insulina durante o periodo de recuperacao.

Behavior of cortisol, ck and lactate in a session of variable resistance

Abstract: Introduction: Complex Training (CT) has been used to achieve Post-activation Potentiation (PAP) of physical capabilities and, in doing so, improve the sports performance of athletes. However, few studies have considered alterations in serum Cortisol, Metabolic Creatine Kinase (MB-CK), Total Creatine Kinase (Total-CK), and Lactate concentrations ([La]) resulting from this training method. Objective: This study determined the behavior of the following blood serum substances in a CT session: Cortisol, MB-CK, Total CK and [La]. Method: Ten military athlete volunteers aged 28.5 ± 4.8 years; 66.2 ± 2.8 kg, 171.4 ± 3.7 cm, 22.6 ± 1.2 kg/m2; 11.3 ± 2.9% of fat tissue took part in the study. The study had a quasi-experimental, intrasubject design. The variable measurements were: Cortisol, MB-CK, Total-CK, and [La], measured before physical exercise and 24 hours post-stress. The CT session consisted of: four series of five repetitions at 30% of 1RM, plus four repetitions at 60% of 1RM, plus three throws of a 575 g projectile, 15 seconds apart. The statistical analysis was carried out through repeated measure ANOVA for Lactate and a Wilcoxon Matched Pairs t-Test for Cortisol, MB-CK and Total-CK. Results: There was no evidence of alterations in the indicators for fatigue ([La] p = 0.36), and muscular injury (Cortisol p = 0.16; MB-CK p = 0.23; Total-CK p = 0.64) after the training sessions. Conclusion: Variables for muscular injury showed no evidence of alterations 24 hours after the CT sessions, hence confirming that the workload did not generate significant post-stress muscular injury. Level of Evidence I; Therapeutic Study: Investigating Treatment Results.

Alterações eletrolíticas relacionadas à dor muscular após exercícios resistidos

Abstract: Introduction Resistance exercises (RE) performed at high intensity cause an inflammatory response and electrolyte abnormalities in blood plasma. Objectives To study the plasma electrolyte changes resulting from a high-intensity session of RE in untrained volunteers, and to correlate these with delayed onset muscle soreness (DOMS). Methods Twenty volunteers, aged 26.9 (±4.4) years, underwent an RE session. The workout (leg extension, squat and leg press) consisted of four sets of 10 maximum repetitions. Electrolytes (Na+, K+, Ca2+ e Mg2+) were evaluated before the training (baseline), immediately (0 min), and 30 minutes after the RE. The DOMS was assessed 24 hours after the sessions. Results The Na+ increased immediately after the RE and returned to normal after 30 min (p<0.001). After 30 min, K+ increased compared to baseline levels and immediately after the RE (p<0.001). Ca2+ and Mg2+ levels did not change throughout the study. Changes in Na+ and K+ levels were correlated immediately (r=-0.511; p=0.021) and 30 min (r=-0.455; p=0.049) after RE. Plasma concentrations of Na+ 0 min were correlated (r=-0.520; p=0.018) with the DOMS. Conclusion High-intensity RE in untrained volunteers leads to changes in plasma concentrations of Na+ and K+. Na+ concentrations immediately after RE were related to DOMS; individuals that presented smaller alterations in this electrolyte reported more muscular pain. Level of evidence II; Diagnostic Studies - Development of diagnostic criteria on consecutive patients (with universally applied reference “gold” standard).