Muscular Endurance Performance and Physiological Effects on Minimum Dosage of Caffeine Ingestion
Ann Nutr Metab 2019;75(suppl 3): 267 Sitti Junaina Musa
Backgound/Aims: Various studies documented the effect of caffeine on sports especially endurance performance, nevertheless insufficient studies document the muscular endurance performance and physiological effects on minimum dosage of caffeine ingestion. The objective of the study was to identify the muscular endurance performance and physiological effects on minimum dosage of caffeine ingestion in amateur runners.
Methods: A total of 36 male amateur runners aged 20–25 years old were recruited and randomly divided into three groups (caffeine, non-caffeine and placebo, n = 12/groups) using stratified sampling method based on pre-treatment of circuit resistance training (CRT) performance results. Caffeine group received treatment for caffeinated drink that contain minimum 3 mg/kg body weight dose of caffeine. Non-caffeinated and placebo group received non-caffeinated drink and plain water, respectively. The CRT, a measurement of muscular endurance was performed by all subjects following 40 minutes ingestion of treatment drinks. Total volume weight lifted (TVWL) and time of completion (TC) of CRT were recorded. Heart rate (HR) and water balance (WB) were measured before and after CRT. Body weight difference between before and after CRT was used to determine sweat rate (SR).
Results: The results show the ingestion of caffeine increased TVWL (p < 0.05), TC (p < 0.05) and HR (p < 0.05). However, caffeine did not change SR (p > 0.05) and WB (p > 0.05) following ingestion.
Conclusions: This study concludes that the acute ingestion of caffeine (3 mg/ kg) was effective to improve the muscular endurance performance.