ANDRE PEDRINELLI
Projetos de Pesquisa
Unidades Organizacionais
Instituto de Ortopedia e Traumatologia, Hospital das Clínicas, Faculdade de Medicina
LIM/41 - Laboratório de Investigação Médica do Sistema Músculoesquelético, Hospital das Clínicas, Faculdade de Medicina
LIM/41 - Laboratório de Investigação Médica do Sistema Músculoesquelético, Hospital das Clínicas, Faculdade de Medicina
4 resultados
Resultados de Busca
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- Blood lactate and oxygen consumption in soccer players: comparison between different positions on the field(2017) SANTOS-SILVA, Paulo Roberto; PEDRINELLI, André; GREVE, Júlia Maria D'AndreaOBJECTIVE: We hypothesize that in players with better aerobic fitness, lactate production was not inhibited after high-intensity exercise, regardless of the footballer's position on the field. METHOD: Sixty professional male soccer players performed cardiopulmonary exercise tests on an ergometric treadmill; respiratory gas exchanges were monitored throughout and blood lactate levels at peak effort was measured, using a portable device. The heart rate response was determined by computerized EKG. Training sessions took place over an average of ten hours per week, and the players had 6.8 years of experience in competitive soccer; they were tested a third of way into the season. The positions tested were (centerback, fullback, midfielder and striker). RESULTS: The following results (mean ± std. dev.) were obtained: (1) peak oxygen consumption of 58.8 ± 4.5 ml.kg-1.min.-1; (2), blood peak lactate of 12.3 ± 1.6 mmol.L-1; (3) maximum heart rate of 193 ± 3.3 beats. min-1; (4); oxygen consumption at the second ventilatory threshold of 49.6 ± 5.0 mL. kg-1.min-1; (5); running speed at the second ventilatory threshold of 13.3 ± 0.8 km.h-1; (6) percentage of oxygen consumption in the second ventilatory threshold of 84 ± 6%. There was no correlation between maximum aerobic level vs. peak lactate concentration (r = -0,031; p = 0.812), nor between submaximal aerobic level vs. peak lactate concentration (r = -0.146; p = 0.335) in the positions tested. CONCLUSION: Better or worse aerobic profiles according to game positions in soccer players do not influence peak lactate levels following high-intensity exercise, and confirms the study hypothesis.
- DURING THE CORONAVIRUS (COVID-19) PANDEMIC, DOES WEARING A MASK IMPROVE OR WORSEN PHYSICAL PERFORMANCE?(2020) SANTOS-SILVA, Paulo Roberto; GREVE, Julia Maria D'Andrea; PEDRINELLI, AndreA mask is a simple device yet it provides high levels of protection. As the virus affects mainly the respiratory tract - the nose, mouth, and lungs - it is highly contagious when people sneeze or cough, or exchange respiratory droplets with other people.This exchange is also promoted when a person is performing physical exercise. Although a mask provides some protection, it does not eliminate the need for social distancing. Around 25% of people infected with the new coronavirus may show no symptoms, yet still transmit the virus. One of the main problems with wearing a mask is that it hinders breathing, with the mask gradually becoming damp, increasing its resistance to air intake. Wearing a mask while performing physical activity requires a period of adaptation, as the flow of air to the lungs is reduced, requiring a reduction in the normal rhythm until the wearer has managed to adapt to it. Vigorous and intense exercise can cause inflammatory activity to increase, and should be minimized in order to protect the immune system. Secretory immunoglobulin A (IgA) is an antibody protein used by the immune system to neutralize pathogens, including viruses, and decreases with intense exercise. Exercise is considered intense when it is necessary to breathe through the mouth to eliminate the higher concentrations of CO2, but mouth breathing is associated with infections of the upper respiratory tract. Preference should be given to light to moderate exercise, around three times a week. Wearing a mask, and training in nasal breathing are the best and safest ways to reduce the entry of particles, and should be encouraged during this COVID-19 pandemic.
- Running economy in elite soccer and futsal players: differences among positions on the field(2017) SANTOS-SILVA, Paulo Roberto; GREVE, Júlia Maria D´Andrea; PEDRINELLI, AndréOBJECTIVE: To determine running economy in a large sample of elite soccer and futsal players to obtain benchmarks in different positions. METHODS: Running Economy is the energy demand at a submaximal running velocity. Players were divided into 6 subgroups. Soccer: defenders, midfielders, and strikers; futsal: defenders, wingers, and pivots. Elite soccer players (n=129) and elite futsal players n=72 performed an incremental running test starting at 8.4 km.h-1 with increments of 1.2 km.h-1 every two minutes on a treadmill until exhaustion. Running Economy was determined by interpolation between ventilatory thresholds 1 and 2 (VT1 and VT2). RESULTS: Running Economy (measured as mL.kg-1.km-1) was compared between the playing positions in the two team sports. In soccer, running economy was 222.7 (defenders), 227.0 (midfielders), and 219.8 (strikers) mL.kg-1.km-1, respectively. In futsal, the corresponding values were 198.5 (defenders), 196.9 (wingers), and 190.5 (pivots) mL.kg-1.km-1, respectively. We no found significantly differences between the three positions in both sports. The Running Economy of futsal players was 12.5% better than that of soccer players. Running Economy correlated positively with oxygen uptake at VT2 in both sports and in all positions. CONCLUSION: Futsal players exhibited better Running Economy than soccer players; this should be considered as a factor in the athlete's training plan.
- Comparing the Aerobic Fitness of Professional Male Soccer Players and Soccer Referees(2019) SANTOS-SILVA, Paulo R.; GREVE, Julia M. D'Andrea; PEDRINELLI, Andre; ALMEIDA, Adriano M.; OSORIO, Bruna B.; FERREIRA, Marcelo; FERREIRA, CelsoWe looked to compare the aerobic performance between professional soccer referees and players. Fifty male soccer referees and 61 male soccer players were tested on a treadmill. The referees and players possessed 15 +/- 7 years and 7 +/- 3 years of experience in soccer, respectively. Significant differences were observed between the referees and players with regards to: age (34.8 +/- 4.6 years vs 20.8 +/- 2.7 years; P < 0.001, maximum oxygen uptake (54.7 +/- 5.4 mL center dot kg(-1)center dot min(-1) vs 58.8 +/- 4.4 mL center dot kg(-1)center dot min(-1); P < 0.001), and maximal heart rate in peak exercise (184 +/- 11 bpm vs 192 +/- 9 bpm, P < 0.001). Less significant differences also were observed and included; running speed at the maximum oxygen uptake (16.6 +/- 1 km center dot h(-1) vs 16.4 +/- 1.1 km center dot h(-1)), running speed at the ventilatory threshold (213.5 +/- 1.1 km center dot h(-1) vs 13.2 +/- 0.9 km center dot h(-1)), and percentage of maximal oxygen uptake at the ventilatory threshold (285.1% +/- 3.2% vs 84.1% +/- 6.2%). The effect size of most comparative variables between the two groups was small (<0.6). Older elite-level soccer referees are able to reach and maintain aerobic physical fitness levels similar to professional soccer players. Aerobic physical fitness may be a measurable factor for maintaining elite-level soccer licensure rather than age alone.