Carbohydrate loading in human muscle: an improved 1 day protocol

  title={Carbohydrate loading in human muscle: an improved 1 day protocol},
  author={Vanessa A. Bussau and Timothy J. Fairchild and Arjun Rao and Peter Steele and Paul A. Fournier},
  journal={European Journal of Applied Physiology},
Abstract. [] Key Method To examine this issue, eight endurance-trained male athletes were asked to eat 10 g·day–1·kg–1 body mass of high-carbohydrate foods having a high glycaemic index over 3 days, while remaining physically inactive. Muscle biopsies were taken prior to carbohydrate loading and after 1 and 3 days of eating the carbohydrate-rich diet. Muscle glycogen content increased significantly (P<0.05) from pre-loading levels of [mean (SE)] 95 (5) to 180 (15) mmol·kg–1 wet mass after only 1 day, and…

Effect of Different Carbohydrate Intakes within 24 Hours after Glycogen Depletion on Muscle Glycogen Recovery in Japanese Endurance Athletes

It is suggested that carbohydrate intake of 5 g/kg BM/d is insufficient for Japanese athletes to recover muscle glycogen stores 24 h after completing a long-term high-intensity exercise.

Post-Exercise Muscle Glycogen Resynthesis in Humans 2

Dietary strategies that can enhance glycogen synthesis from sub-optimal amounts of CHO or energy intake are of practical interest to many athletes; in this scenario, the co-ingestion of protein with CHO can assist glycogen storage.

Carbohydrates for training and competition

Whether implementing additional “train-low” strategies to increase the training adaptation leads to enhanced performance in well-trained individuals is unclear.

Does a pre-exercise carbohydrate feeding improve a 20-km cross-country ski performance?

In spite of the different environmental conditions during the 2 experimental sessions, the illustrated results suggest an improvement of total performance time following the maltodextrins feeding.

Fundamentals of glycogen metabolism for coaches and athletes

This review highlights the practical implications of the latest research related to glycogen metabolism in physically active individuals to help sports dietitians, coaches, personal trainers, and other sports health professionals gain a fundamental understanding of glycogens metabolism.

Nutrition Strategies for the Marathon

  • L. Burke
  • Environmental Science
    Sports medicine
  • 2007
There is no evidence that a low carbohydrate diet enhances the outcomes of training or provides benefits as a depletion phase prior to carbohydrate loading, and a low carbohydrates diet may even impair performance if carried out for extended periods.

Glycogen synthesis in muscle fibers during active recovery from intense exercise.

Active recovery in comparison to passive recovery does not affect glycogen resynthesis in Type II muscle fibers despite being associated with an unfavorable hormonal environment but results in a marked glycogen mobilization in Type I muscle fibers.

Addition of Protein in Carbohydrate Supplementation Does not Improve Performance of Amateur Runners in Exercise above the Anaerobic Threshold

The results suggest that, unlike supplementation with CHO alone, the addition of PTN in CHO supplements does not result in improved performance for the studied population and exercise intensity.

Postexercise muscle glycogen resynthesis in humans.

Dietary strategies that can enhance glycogen synthesis from suboptimal amounts of CHO or energy intake are of practical interest to many athletes; in this scenario, the coingestion of protein with CHO can assist glycogen storage.



Muscle glycogen loading with a liquid carbohydrate supplement.

Glycogen loading can be accomplished at least as effectively and more comfortably by substituting a maltodextrin drink for some of the pasta and rice in a glycogen loading diet.

The effects of carbohydrate loading on muscle glycogen content and cycling performance.

Muscle glycogen contents were similar at the end of the 3-hr trial, indicating a greater utilization of glycogen when subjects were CHO loaded, which may have been responsible for their improved cycling performance.

Carbohydrate-Loading and Exercise Performance

There is little or no effect of elevating pre-exercise muscle glycogen contents above normal resting values on a single exhaustive bout of high-intensity exercise lasting less than 5 minutes, and there is no benefit of increasing starting Muscle glycogen content on moderate-intensity running or cycling lasting 60 to 90 minutes.

The role of dietary carbohydrates in muscle glycogen resynthesis after strenuous running.

It appears that muscle glycogen can be normalized between daily strenuous running activity, and frequent feedings of a high carbohydrate diet did not enhance Muscle glycogen synthesis when compared to equal amounts of carbohydrates in two meals.

Effects of 3 days of carbohydrate supplementation on muscle glycogen content and utilisation during a 1-h cycling performance

It is concluded that additional CHO provides no benefit to performance for athletes who compete in intense, continuous events lasting 1 h and whole-muscle glycogen depletion does not determine fatigue at this exercise intensity and duration.

Muscle glycogen supercompensation: absence of a gender-related difference

It is concluded that female athletes have the capacity to accumulate supranormal levels of muscle glycogen, and when exercise-trained males and females are fed comparable amounts of CHO relative to lean body mass, there is no gender-related difference in their ability to accumulate superspecific levels of Muscle glycogen.

Effects of endurance exercise training on muscle glycogen accumulation in humans.

It is concluded that endurance exercise training enhances the capacity of human skeletal muscle to accumulate glycogen after glycogen-depleting exercise.

Persistence of supercompensated muscle glycogen in trained subjects after carbohydrate loading.

It is indicated that supercompensated muscle glycogen levels can be maintained for at least 3 days in a resting athlete when a moderate-CHO diet is consumed.

Effect of exercise-diet manipulation on muscle glycogen and its subsequent utilization during performance.

It is demonstrated that muscle glycogen can be elevated to high levels with a moderate exercise-diet regimen and carbohydrate loading is of no benefit to performance for trained runners during a 20.9-km run.

Carbohydrate feedings and exercise performance: effect of initial muscle glycogen concentration.

To determine whether the ergogenic benefits of carbohydrate (CHO) feedings are affected by preexercise muscle glycogen levels, eight cyclists performed four self-paced time trials on an isokinetic