Research
Energy balance
Carbohydrate ingestion during exercise does not result in a significant sparing of muscle glycogen or an improvement in cycling performance during 2 hours of exercise when initial glycogen levels are elevated.
Practitioners should note that carbohydrate drinks may not enhance performance or glycogen preservation in well-trained cyclists with high initial glycogen levels.
StrongRefutesmedium confidence
These results suggest that, when the initial glycogen levels are elevated, carbohydrate ingestion during exercise does not result in a significant sparing of muscle glycogen or an improvement in cycling performance during 2 h of exercise.
Why this rating
Based on study design from abstract.
Source
Influence of selected carbohydrate drinks on cycling performance and glycogen use
M. G. Flynn et al. · Medicine & Science in Sports & Exercise · 1987
DOI 10.1249/00005768-198702000-00008
other · n=8Cited 107×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Blood glucose levels were significantly higher at 60 minutes during trials with maltodextrin and fructose, and maltodextrin and high fructose corn syrup compared to water.Strong
- No significant differences were observed between trials in blood lactate, serum glycerol, respiratory exchange ratio, or the subjects' perception of effort.Strong
Related findings · Energy balance
- Achieving a total body weight loss of 10-15% (or >10-15 kg) through Total Diet Replacement (TDR) induces remission of Type 2 Diabetes in individuals with short-duration disease.Strong
- Bariatric surgery is superior to medical management alone for inducing significant long-term weight loss, remission of type 2 diabetes, and reduction in mortality for patients with BMI ≥ 40 or ≥ 35 with comorbidities.Strong
- Achieving type 2 diabetes remission requires significant weight loss (≥15 kg) via major caloric restriction, independent of macronutrient composition.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →