Research
Energy balance
Carbohydrate ingestion before exercise improves subsequent time trial performance compared with fat ingestion.
Endurance athletes should prioritize carbohydrate intake before performance to enhance time trial outcomes.
StrongSupportsmedium confidence
Yet despite lower carbohydrate use with fat feeding, the time taken to complete the time trial was less after carbohydrate than after fat ingestion.
Why this rating
Based on study design from abstract.
Source
Effect of Caffeine Co‐Ingested with Carbohydrate or Fat on Metabolism and Performance in Endurance‐Trained Men
Talia L. Jacobson et al. · Experimental Physiology · 2001
DOI 10.1113/eph8602072
other · n=8Cited 73×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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