Ketone monoester do not offer metabolic advantage when consuming 120 g/hr carbohydrate 🥤
Not worth it, if fuelling high carb?
Ketone monoester reduces blood glucose, exogenous CHO oxidation and oxidation efficiency in trained male cyclists when fed 120 g/h of CHO during exercise
Study Details
This new study recruited 8 trained male cyclists to a crossover design where they completed 3hr at 95% lactate threshold (LT) followed by 150% LT to exhaustion tests 🚴♂️
Participants completed three conditions…
1️⃣ 0 g/hr (placebo)
2️⃣ 120 g/hr carbs (CHO)
3️⃣ 120 g/hr carbs + 70g ketone monoester (CHO+KME)
Prior to each test participants consumed 12 g/kg carbs during 36hr pre-test and 2 g/kg at a pre-exercise meal 🍽️
Key Findings
🩸 Mean blood glucose was significantly lower in CHO+KME vs CHO alone
🔥 Exogenous carb oxidation and oxidation efficiency were significantly lower in CHO+KME vs CHO alone
⏱️ Exercise capacity was significantly greater in CHO (349 ± 189 s) and CHO+KME (319 ± 225 s) compared to PLA (75 ± 105 s)
❌ With no differences between CHO and CHO+KME
Conclusion
Ketone monoester ingestion does not enhance exercise capacity when consumed alongside high-carbohydrate intakes 🤷♂️
Plus it reduces blood glucose concentrations, exogenous CHO oxidation and oxidation efficiency when compared to carbs alone ⚠️
Fuelling high carb during endurance events? Stick to carbs alone.
Reference
https://link.springer.com/article/10.1007/s00421-026-06209-6
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