Caffeine during exercise enhances performance in the heat 🌡️
...without excess physiological strain!
In-Exercise Caffeine Improves Exercise Performance in the Heat Without Exacerbating Hyperventilation and Brain Hypoperfusion
Study Details
This new study recruited 12 healthy young adults to complete 2 cycling trials consuming either…
1️⃣ Caffeine (5 mg/kg)
2️⃣ Placebo
…5 mins into the exercise session ⏱️
Both exercise trials were 30 min at 55% of peak oxygen uptake in the heat (35 °C and 50% relative humidity) 🌡️
…followed by high-intensity cycling at 90% of peak oxygen uptake until exhaustion🪫
Here is what they found ⬇️
Key Findings
⏰ High-intensity cycling duration was longer in caffeine vs. placebo (218 ± 75 vs. 165 ± 82 sec)
🧠 Rating of perceived exertion at the end of moderate-intensity exercise was lower in the caffeine
Importantly, comparisons between trials showed that caffeine did not exacerbate…
😮💨 hyperventilation
🩸 cerebral hypoperfusion
🥵 hyperthermia
(all potential risks of caffeine intake in hot environments)
Conclusion
Caffeine intake during exercise can improve late-stage performance during prolonged exercise in the heat with minimal physiological strain ✅
Reference
https://pubmed.ncbi.nlm.nih.gov/40550151/
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