Association of Antioxidant Intake and Blood Lactate Level Among 20–55 Years Old Malaysian Adults
Abstract Objectives This study aimed to investigate the association between dietary antioxidant intake and blood lactate level among 20–55 years old Malaysian adults. Methods Subjects (N = 80) of this cross-sectional study were recruited through convenience sampling. Sole Fitness LCB Upright Bike was used to conduct the modified Wingate Anaerobic Test. Dietary antioxidant level was assessed by using Malaysian Adult Nutrition Survey (MANS) 2014 food frequency questionnaire. Short Form International Physical Activity Questionnaire (IPAQ) was used to assess the physical activity level of the subjects. Blood lactate concentration was assessed by The Edge TM blood lactate analyzer, before and after exercise. Saliva samples were collected from subjects for total antioxidant capacity determination using the 2,2-diphenyl-1- picryl-hydrazyl test of saliva (DPPHS) assay. Data was analyzed using SPSS version 25.0. Results The median of total antioxidant intake among Malaysian male and female adults were 1030.64 (734.74) and 9392.90 (10360.44) mg/day, respectively. A significant difference between the means blood lactate level before and after exercise was observed, however, no significant difference in the mean salivary total antioxidant capacity (TAC) before and after exercise. No significant association observed between the total antioxidant intake and salivary TAC before exercise for both males and females, whereas a significant positive moderate association was observed after exercise for females. A significant inverse moderate association between blood lactate level and salivary TAC before exercise was observed among the males in the present study but no association found after exercise for both males and females. Conclusions Present study indicated no significant association between the total dietary antioxidant intake and blood lactate level among Malaysian adults aged 20–55 years old. Future research with larger sample size should develop strategically to confirm these initial findings. Funding Sources International Medical University, Malaysia