Nutritional Advice El Mondo
Objectives:
Although pre-exercise consumption of a low-glycemic-index (LGI) carbohydrate meal is generally recommended, the findings regarding subsequent exercise performance are inconsistent. Therefore, this review article (meta-analysis) has been conducted.
Does a pre-exercise low-glycemic-index carbohydrate meal lead to greater endurance performance than a pre-exercise high-glycemic-index (HGI) meal?
Study design:
This review article included 15 trials (randomized controlled or crossover trials).
All included studies were of low research quality.
Results and conclusions:
The investigators found the synthesized effect size [d = 0.42, z = 3.40, p = 0.001] indicated that the endurance performance following a low-glycemic-index carbohydrate meal was superior to that following a high-glycemic-index meal.
The investigators found subgroup analyses demonstrated that the treatment effect did not vary across outcome measures (exercise to exhaustion, time trial and work output) or athletic status (trained or recreational participants).
The investigators concluded weak evidence supports the claim that endurance performance following pre-exercise consumption of a low-glycemic-index (LGI) carbohydrate meal is superior to that following pre-exercise consumption of a high-glycemic-index (HGI) meal. Further high-quality research in this area is warranted.
Original title:
Effect of pre-exercise carbohydrate diets with high vs low glycemic index on exercise performance: a meta-analysis by Heung-Sang Wong S, Sun FH, […], Ya-Jun Huang W.
Link:
https://www.ncbi.nlm.nih.gov/pubmed/28383695
Additional information of El Mondo:
Find here more information/studies about sport nutrition and carbohydrate.
A low-glycemic-index (LGI) carbohydrate diet is a diet with a lot of products with GI lower than 55. Products with GI lower than 55 are called low-glycemic-index carbohydrate products. These products are low-glycemic-index carbohydrate products.