8th Asia Pacific Conference on Exercise and Sports Science 2017
Name: Associate Prof.Chee Keong Chen,PhD
Position: :Associate Professor of Exercise and Sports Science
Address: Exercise and Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
Dr. Chee Keong Chen is an Associate Professor in the Exercise and Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia (USM). He was a health and physical education lecturer in a teacher training college before joining USM as a university lecturer in 2005. He obtained his Bachelor of Education (Physical Education) from Universiti Pertanian Malaysia; Masters in Sports Science (Health & Fitness) from University of Essex, United Kingdom; and PhD in Sports Science from USM. He was awarded a postgraduate prize for his PhD thesis by the Nutrition Society of Malaysia in 2005. His research interests include effects of exercise-induced oxidative stress, antioxidant supplementation on sports performance, health and fitness among sedentary population. His academic work has been published in international peer-reviewed journals and has been invited as a speaker in both international and national conferences. He was a former international volleyball referee. He has been the President of the Sports Science Society of Kelantan, Malaysia since 2007. He was the organising chairman of 4 international sports science conferences organised by the Sports Science Unit, USM. He is the immediate past President of the Asian Council of Exercise & Sports Science (ACESS) and Associate Editor cum Section Editor for Exercise Physiology & Sports Nutrition for the Asian Journal of Exercise and Sports Science (AJESS). He was appointed as a visiting research fellow in the University of Essex, United Kingdom in 2013. He also serves as an editorial board member for international and national journals
An Update: Effects of Supplements with Antioxidant Properties on Sports Performance
The rise in oxygen consumption during prolonged and exhaustive exercise may lead to oxidative stress due to increased free radical production. Free radicals refer to reactive oxygen species (ROS) which are highly reactive due to an unpaired valence electron. Antioxidants are substances that scavenge free radicals and offer protection from the damaging effects of free radicals. Exercise-induced oxidative stress has been reported in numerous studies. For instance, significant increases in F2-isoprostanes and lipid hydroperoxides following exhaustive exercise indicate that prolonged strenuous exercise induces ROS production. It has been postulated that free radicals might damage the sarcoplasmic reticulum resulting in reduced calcium release during the depolarization phase of the muscle and consequently lead to decreased muscular performance. Hence, researchers have used various antioxidants to investigate their effects on sports performance. There is evidence in the current literature on the positive effects of certain antioxidants on endurance performance. My colleagues and I have also carried out several studies on the effects of nutritional supplements with antioxidant properties on endurance performance. These supplements include palm vitamin E, caffeine, Eurycoma Longifolia Jack (Tongkat Ali), honey and bee bread. Our findings have demonstrated that supplementation of palm vitamin E and Eurycoma Longifolia Jack did not seem to elicit any beneficial effects on endurance sports performance. However, more studies with higher dosages and duration of supplementation are warranted to substantiate these observations. On the other hand, we have shown that caffeine, honey drink as well as bee bread may have ergogenic effect on endurance performance in the heat. Nevertheless, future studies are warranted to confirm these findings and to identify the precise mechanisms for these ergogenic effects.