Physiological responses and characteristics of table tennis matches determined in official tournaments.

The purpose of this study was to verify the physiological responses and the match characteristics of table tennis and also to compare these responses in 2 different performance-level athletes from official tournaments. Twenty male table tennis players (12 regional experience-RP and 8 national and international experience-NP) were participants in the study. Blood lactate concentration ([LAC]) and heart rate (HR) were measured as physiological parameters in 21 official table tennis matches, and other 12 matches had recorded the duration of rally (DR), rest time, effort and rest ratio (E:R), total playing time (TPT), effective playing time (EPT), and frequency of shots by video analyses. The [LAC] verified in all matches was 1.8 mmol.L (+/-0.8), whereas the [LAC] peak was 2.2 mmol.L (+/-0.8). There were no significant differences between the 2 groups (p > 0.05) in both parameters. The HR was 164 b.min (+/-14), corresponding to 81.2% (+/-7.4) of the predicted maximum HR. As characteristics of the matches, the DR corresponded to 3.4 seconds (+/-1.7), rest time to 8.1 seconds (+/-5.1), E:R to 0.4 (+/-0.2), TPT to 970.5 seconds (+/-336.1), EPT to 44.3% (+/-23.7), and frequency of shots to 35.3 balls.min (+/-7.7). Among groups, the rest time was lower in RP than in NP. Consistently, the E:R and EPT were higher in RP than in NP (p < 0.05). The results suggest that table tennis matches present the aerobic system as a principal output energy, the phosphagenic system being the most important during efforts. The information pertaining to the physiological profile and the characteristics of table tennis should be used by coaches planning physical training and specific exercise prescriptions aiming at achieving maximal sport performance.

Resposta hematológica de ciclistas após competição / Haematological response of cyclists after competition

O objetivo do estudo foi analisar a reposta hematológica de ciclistas após uma competição de nível nacional. Participaram 20 atletas (35 ± 7,90 anos, 1,75 ± 0,06m de estatura, 18,71 ± 4,12% de gordura, VO2 máx de 57,90 ± 6,80 ml/kg/min, 345 ± 50,90W, 202 ± 6,77 bpm de frequência cardíaca máxima), que passaram por duas coletas de sangue, monitoramento do peso corporal e da ingesta de água. Após a competição foi verificada queda no peso corporal (78,20 ± 9,10 para 76,70 ± 9,20 kg, p= 0,0001) com consumo médio de 620 ± 532,20 ml de água, e aumento significativo (p = 0,0001) na concentração de eritrócitos (5,28 ± 0,44 para 6 ± 0,41 milhões/mm3), de hemoglobina (15,80 ± 1 para 17,70 ± 0,95 g/%), de plaquetas (211.950 ± 42.488,20 para 285.050 ± 47.097,20 un/mm3) e hematócrito(47 ± 2,97 para 54 ± 2,79%). Foi verificada forte correlação (r > 0,7) entre o hematócrito como nível de eritrócitos e de hemoglobina. Concluiu-se que existe aumento na quantidade dos componentes hematológicos em ciclistas após competição, com fraca correlação com a ingesta voluntária de água,peso corporal e nível do volume máximo de oxigênio...

The aim of the study was to analyze the hematologic response of cyclists after a nationwide competition evel. Participated in 20 athletes (35 ± 7,90 years old, 1,75 ± 0,06m of height, 18,71 ± 4,12% of body fat, VO2max 57,90 ± 6,80 ml/kg/min, 345 ± 50,90W, 202 ± 6,77bpm of maximum heart rate), which underwent two blood samples, monitoring of body weight and water intake. After the competition was observed decrease in body weight (78,20 ± 9,10 to 76,70 ± 9,20 kg, p = 0,0001) with an average consumption of 620 ± 532,20 mL of water, and a significant increase (p = 0,0001) in the concentration of erythrocytes (5,28 ± 0,44 6 ± 0,41 million/mm3), hemoglobin (15,80 ± 1 to 17,70 ± 0,95 g/%), the platelets (211.950 ± 42.488,2 to 285.050 ± 47.097,2 un/mm3) and hematocrit (47 ± 2,97 to 54 ±2,79%). Strong correlation (r > 0.7) between hematocrit with erythrocytes level and hemoglobin was observed. It was concluded that there is an increase in the number of hematological components of cyclists after competition with weak correlation with the water intake, body weight and the maximum volume of oxygen level...