By Dr. Priyom Bose, Ph.D.Apr 16 2024Reviewed by Benedette Cuffari, M.Sc. A recent Sports Medicine – Open study conducted a randomized controlled trial to evaluate how varying carbohydrate intake and the glycemic index impact performance in endurance training regimens in men.
Energy requirements in the muscles increase dramatically while transitioning from rest to exercise. At this time, fats or carbohydrates are used to produce adenosine triphosphate . With the growing intensity of exercise, carbohydrates become the key energy source, thus replacing fat. A high-carbohydrate diet with low GI has the potential to overcome the limitations often associated with the LCHF diet. In fact, recent studies have reported that this type of diet can lead to improved metabolic flexibility and, as a result, superior performance improvements during an incremental cycling test. However, few long-term studies have been conducted that assess the impact of a low GI diet relative to an LCHF diet on performance outcomes and metabolic flexibility.
Study findings The LOW-GI diet led to reduced energy intake, decreased blood lactate concentrations during exercise, higher values in the graded exercise test, maintenance of glycogen stores, and improved TT performance. Importantly, the LCHF diet could negatively affect long-term health status despite its promising effects on fat oxidation and body composition. The lower intake of essential macronutrients and high-fat content could contribute to these adverse effects; therefore, this type of diet should be recommended with appropriate caution.
Overall, the study findings provide evidence that relative to the LCHF or HIGH-GI diet, the LOW-GI diet could lead to beneficial changes in substrate oxidation during extended periods of exercise and improve endurance performance.
Source: Healthcare Press (healthcarepress.net)
Glycemic Index Adenosine Adenosine Triphosphate Cycling Diet Exercise Exercise Test Medicine Metabolism Muscle Running Sports Medicine
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