The consumption of riceberry rice combined with exercise enhances the production of circulating glucagon-like peptide-1 and inhibits creatine kinase compared to that with white rice

Abstract

The effects of the consumption of rice-berry rice compared with white rice on circulating total glucagon-like peptide-1 (GLP-1), glucose, and creatine kinase related to appetite perception and muscle pain score are not well understood. Purpose: The present study aimed to investigate the effects of pre-exercise consumption of rice-berry rice compared with white rice on postprandial total glucagon-like peptide-1, glucose, creatine kinase, muscle pain scores, and appetite perception. Material and methods: Twelve males performed cycling exercise for one hour at 80% maximum heart rate, followed by either consumption of rice-berry rice or white rice, in a randomized crossover design. It took venous blood samples at baseline, 30, 60, 90, 150, and 180 minutes. Total glucagon-like peptide-1, glucose, creatine kinase, appetite perception, and muscle pain scores were measured. We analyzed the data using a two-factor repeated-measures ANOVA and a paired t-test. Results: The consumption of white rice and rice-berry rice enhanced the production of total glucagon-like peptide-1 immediately post-exercise. However, a longer production of postprandial total glucagon-like peptide-1 concentration was found in the rice-berry rice condition at 30 minutes following the exercise. We observed a higher postprandial glucose concentration in the white rice condition immediately after exercise. The perception of fullness was elevated during and 30 minutes following exercise in both rice conditions, with fullness perception increasing immediately following exercise in the rice-berry rice condition. The perception of hunger perception was suppressed immediately following exercise in the rice-berry rice condition. Creatine kinase concentration increased significantly immediately following exercise in the white rice condition; it tended to increase in the rice-berry rice condition. Muscle pain scores increased during, immediately following, and 30 minutes following exercise in the two conditions. Conclusions: Ingestion of rice-berry rice before exercise enhanced the production of total glucagon-like peptide-1 for longer than in white rice conditions. Hunger scores were suppressed while the perception of fullness was elevated in the rice-berry rice condition. Creatine kinase and muscle pain scores in rice-berry rice condition were lower than in the white rice condition. © JPES.