Casein pre-workout proves more effective for fat oxidation than whey protein, carbohydrate or fasted workouts alone.
Everywhere you look, you can’t hide from the best ways to lose fat. Dietary fasting strategies have become increasingly popular in recent years to improve metabolic health, augment weight loss, and enhance body composition.
A pilot study from the Exercise and Performance Nutrition Laboratory, School of Health Sciences, Lindenwood University suggests that consumption of 25g of whey protein isolate or 25g of casein protein 30 min before moderate-intensity treadmill exercise while fasted significantly increased rates of post-exercise energy expenditure when compared to the pre-exercise consumption of 25g of maltodextrin or a non-caloric control. While differences in RER during exercise were not observed during either fasted cardiovascular exercise or postprandial exercise, significantly more fat was oxidized following ingestion of casein vs. whey protein compared at two time points.
These results indicate rates of energy expenditure and fat oxidation can be modulated after CAS protein consumption prior to moderate-intensity cardiovascular exercise and that fasting did not lead to more fat oxidation during or after exercise.
Journal of the International Society of Sports Nutrition 2018 15:56
