Publications (3)3.19 Total impact
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Article: The concentrations of serum, plasma and platelet BDNF are all increased by treadmill VO₂max performance in healthy college men.
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ABSTRACT: The most current human-based studies in which brain-derived neurotrophic factor (BDNF) levels in the peripheral blood system are analyzed use it as an indicator that represents BDNF levels in the CNS. However, whether circulating BDNF (serum and plasma) is positively or inversely associated with cardiorespiratory fitness levels (VO(2max)) is still controversial, and no study has done to investigate exercise effects on the concentration of BDNF stored in circulating platelets which, in fact, store a large amount of circulating BDNF. Thus, the purpose of this study was to determine the relation between VO(2max) and all circulating BDNF levels (serum, plasma and platelets) in college male students (N=18; age, 19 ± 1 years; height, 173.22 ± 7.65 cm; weight, 78.25 ± 14.25 kg; body fat percent, 13.82 ± 5.68%). Dual X-ray energy absorptiometry whole body scan was used to measure their body composition. After the overnight fast, all participants were performed VO(2max) test, and their blood was collected at rest and immediately after the exercise. Our data resulted in significant increases in platelet counts and serum, plasma and platelet BDNF levels immediately after the exercise (p<0.01). VO(2max) had a significant negative correlation with serum BDNF, plasma BDNF and platelet BDNF at rest (p<0.05) but a significant positive correlation with serum, plasma BDNF, and platelet BDNF immediately after the exercise (p<0.01). However, our data show no correlation between VO(2max) and platelet count both at rest and immediately after the exercise. In conclusion, this is the first study showing that basal BDNF levels are inversely correlated with cardiorespiratory fitness levels but that the inverse correlations turn into positive correlations with all circulating BDNF levels immediately after the exercise. Moreover, it is the first time to provide evidence that platelet BDNF levels are also positively affected by the exercise. However, future studies will be needed to investigate what tissues provide BDNF into the circulating system and to elucidate the role of circulating BDNF.Neuroscience Letters 05/2012; 519(1):78-83. · 2.11 Impact Factor -
Article: Anti-doping education and dietary supplementation practice in Korean elite university athletes.
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ABSTRACT: This study was conducted to investigate relationships and gender differences in dietary supplement (DS) and oriental supplement (OS) prevalence as well as anti-doping awareness during training and the game period. Korea National Sport University athletes (343 male and 136 female) participated in this study and completed DS and OS practice and anti-doping awareness questionnaires. Forty-six percent of athletes used DS during the training period, and there was significantly higher DS use in females (53%) compared to males (43%) (P < 0.05). Twenty-eight percent of athletes used OS, and there was significantly higher OS use in females (35%) than males (26%) (P < 0.05) during the training period. The primary reason of DS use was to supply energy both in males (36%) and females (28%). The main reason for male athletes' OS use was to supply energy (41%). Meanwhile, the reasons for female athletes' OS use were to supply energy (23%), to maintain health (19%), and to improve recovery ability (20%), which showed a significant gender difference (P < 0.05). Athletes rated their perceived degree of satisfaction, perceived importance, and beliefs in efficacy of DS and OS use all over 50% during the training period, and no gender differences were detected. In a comparison between athletes educated about anti-doping (at least more than one time) and non-received athletes, DS and OS use during the training period was 2.30 (1.47-3.60) and 1.71 (1.03-2.82), respectively. DS and OS use immediately before the game period was 2.38 (1.50-3.80) and 3.99 (1.20-13.28), respectively. Elite athletes' anti-doping education was highly related to increased DS use during the training period and immediately before the game. Although elite athletes use various DS and OS during the training period and before the game period, doping education for elite athletes is related with DS and OS use during the training period and before the game.Nutrition research and practice 08/2011; 5(4):349-56. · 1.08 Impact Factor -
Article: Independent and joint associations of cardiorespiratory fitness and muscle fitness with metabolic syndrome in Korean men.
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ABSTRACT: Higher cardiorespiratory fitness (CRF) and muscle fitness (MF) attenuate metabolic syndrome prevalence in men. However, associations of CRF and MF with metabolic syndrome were poorly understood in South Korean men. Therefore, this study aimed to examine the independent and joint associations of CRF and MF on metabolic syndrome prevalence in Korean men. Korean men (n=1,097, mean age=44 years) were recruited from the central areas of South Korea for this Preventive Health Study (PHS) between May, 2007, and October, 2008, and they underwent a health examination, maximal treadmill test, and five different muscle fitness tests for this study. From our data, separate age- and current smoking-adjusted logistic regression models revealed a graded inverse association of metabolic syndrome prevalence with CRF (P<0.0001) and MF (P<0.0001). The association of MF with metabolic syndrome remained significant and became attenuated with further adjustment, for CRF (P=0.02). However, the association of CRF with metabolic syndrome remained unchanged when adjusted for MF (P<0.0001). In the joint analysis using the low-strength and CRF unfit group as the baseline, the odds ratios (95% confidence intervals) for having metabolic syndrome were 0.52 (0.26-1.05) for the high-strength and CRF unfit group, 0.39 (0.24-0.65) for the low-strength and CRF fit group, and 0.28 (0.17-0.46) for the high-strength and CRF fit group. Both cardiorespiratory fitness and muscle fitness showed independent and joint inverse associations with metabolic syndrome prevalence in Korean adult men.Metabolic syndrome and related disorders 03/2011; 9(4):273-9.
