Research
Energy balance
Ingestion of approximately 40 g of carbohydrate does not improve maximal cycling performance lasting approximately 30 min.
Carbohydrate ingestion immediately before a 20 km time trial is not beneficial for performance.
StrongRefutesmedium confidence
We conclude that the ingestion of approximately 40 g of carbohydrate does not improve maximal cycling performance lasting approximately 30 min.
Why this rating
Based on study design from abstract.
Source
Carbohyrate Ingestion Immediately Before Exercise Does Not Improve 20 km Time Trial Performance in Well Trained Cyclists
G. Palmer et al. · International Journal of Sports Medicine · 1998
DOI 10.1055/s-2007-971938
other · n=14Cited 46×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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