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Case studies

RunningMarathon
26th April, 2026

London Marathon

Louise Small

42.2km
2hrs 28mins

Carb per hour: 121g

Sodium per hour: 909mg

Fluid per hour: 788ml

Relative sodium concentration: 1154mg/L

View Louise's Numbers
RunningMarathon
19th October, 2025

Amsterdam Marathon

Louise Small

42.2km
2hrs 27mins

Carb per hour: 78g

Sodium per hour: 446mg

Fluid per hour: 588ml

Relative sodium concentration: 759mg/L

View Louise's Numbers
RunningMarathon
27th October, 2024

Frankfurt Marathon

Louise Small

42.2km
2hrs 29mins

Carb per hour: 94g

Sodium per hour: 481mg

Fluid per hour: 722ml

Relative sodium concentration: 667mg/L

View Louise's Numbers
RunningMarathon
16th April, 2023

Rotterdam Marathon

Louise Small

42.2km
2hrs 31mins

Carb per hour: 65g

Sodium per hour: 397mg

Fluid per hour: 596ml

Relative sodium concentration: 667mg/L

View Louise's Numbers
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