Rapid carbohydrate loading after a short bout of near maximal-intensity exercise.

  title={Rapid carbohydrate loading after a short bout of near maximal-intensity exercise.},
  author={Timothy J. Fairchild and Steve Fletcher and Peter Steele and Carm{\'e}l Goodman and B. Dawson and Paul A. Fournier},
  journal={Medicine and science in sports and exercise},
  volume={34 6},
PURPOSE One limitation shared by all published carbohydrate-loading regimens is that 2-6 d are required for the attainment of supranormal muscle glycogen levels. Because high rates of glycogen resynthesis are reported during recovery from exercise of near-maximal intensity and that these rates could in theory allow muscle to attain supranormal glycogen levels in less than 24 h, the purpose of this study was to examine whether a combination of a short bout of high-intensity exercise with 1 d of… 

An acute bout of high-intensity intermittent swimming induces glycogen supercompensation in rat skeletal muscle

The results indicate that high-intensity intermittent exercise as well as low-intensity continuous exercise could induce glycogen supercompensation in rat skeletal muscle.

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.

Nutrition and recovery of muscle energy stores after exercise

It is suggested to initiate recovery with rapidly absorbed carbohydrates followed by addition of lipids in a second phase when both muscle glycogen and lipid replenishment is required, as is presumably the case before very prolonged endurance exercise.

Effects of chromium supplementation on glycogen synthesis after high-intensity exercise.

Chromium supplementation did not augment glycogen synthesis during recovery from high-intensity exercise and high-carbohydrate feeding, although there was a trend for lower PI 3-kinase activity.

The effects of carbohydrate loading 48 hours before a simulated squash match.

It is suggested that ingestion of a diet high in carbohydrate preceding simulated competitive squash produces increased rates of carbohydrate oxidation and maintains higher blood glucose concentrations, and these metabolic effects were associated with improved physical performance.

Effect of a 2-h hyperglycemic–hyperinsulinemic glucose clamp to promote glucose storage on endurance exercise performance

It is suggested that carbohydrate loading 18 h previously by means of a 2-h HCC improves cycling performance by 3.3% without any change in pattern of substrate oxidation.

International Society of Sports Nutrition position stand: Nutrient timing

The timing of the energy intake and the ratio of certain ingested macronutrients are likely the attributes which allow for enhanced recovery and tissue repair following high-volume exercise, augmented muscle protein synthesis, and improved mood states when compared with unplanned or traditional strategies of nutrient intake.

Muscle glycogenolysis and resynthesis in response to a half Ironman triathlon: a case study.

Completing a half Ironman triathlon depends on a high rate of muscle glycogenolysis, which demonstrates the importance of exogenous carbohydrate intake during the race.

Effect of exhaustive ultra-endurance exercise in muscular glycogen and both Alpha1 and Alpha2 Ampk protein expression in trained rats

In conclusion, acute exhaustive ultra-endurance exercise promoted muscle glycogen depletion and it seems that total AMPK protein and gene expression is more influenced by status training.

Recovery from run training: efficacy of a carbohydrate-protein beverage?

Additional calories from CHO or P above that provided in sports drinks does not improve subsequent performance after recovery; but less soreness suggests benefits with CHO-P.



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 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.

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.

Muscle Glycogen Resynthesis after Short Term, High Intensity Exercise and Resistance Exercise

Several factors differ during post-exercise recovery from short term, high intensity exercise compared with prolonged exercise, and they may act in combination to stimulate rapid muscle glycogen resynthesis rates.

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.

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.

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.

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 Synthesis Before and After Exercise

  • J. Ivy
  • Biology
    Sports medicine
  • 1991
Because of the paramount importance of muscle glycogen during prolonged, intense exercise, a considerable amount of research has been conducted in an attempt to design the best regimen to elevate the muscle’s glycogen stores prior to competition and to determine the most effective means of rapidly replenishing the muscle glycagen stores after exercise.

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