Personalised carbohydrate feeding during exercise 🚴‍♂️

The future of carb feeding?

Personalised carbohydrate feeding during exercise based on exogenous glucose oxidation: a proof-of-concept study

Study Details

This new study investigated whether exogenous glucose oxidation rates achieved with a high dose of carbs…

…could inform a personalised glucose dose whilst maintaining glucose oxidation rates with a lower dose 🔍

Eleven endurance-trained participants completed 2 x 150-min cycling bouts with either..

1️⃣ High-Glucose Dose (90 g/hr)

2️⃣ Personalised Dose

Key Findings

Here is what they found ⬇️

The personalised dose provided 28% less glucose (~ 65 ± 10 g/hr) 📉

Yet peak exogenous glucose oxidation was not different (0.91 ± 0.19 g/min) vs the higher dose (0.90 ± 0.15 g/min) 🔥

There were also no statistically or biologically significant differences between the trials for…

🩸 Plasma glucose

🩸 Lactate concentrations

🔥 Endogenous CHO oxidation rates

RPE and stomach fullness were also significantly lower with the personalised dose vs the 90 g/hr dose 🧠

Conclusion

More isn’t always better.

Personalised glucose feeding strategies may be best to optimise performance whilst minimising perception of effort and gastrointestinal discomfort ✅

Reference

https://performancenutrition.biomedcentral.com/articles/10.1186/s44410-025-00003-9