Case studies
1st
RunningUltra
13th June, 2026
South Downs Way 100
Sarah Webster
160.0km
14hrs 27mins
Mild
Carb per hour: 59g
Sodium per hour: 281mg
Fluid per hour: 413ml
Relative sodium concentration: 679mg/L
View Sarah's Numbers1st
RunningUltra
13th June, 2026
South Downs Way 100
Sarah Webster
160.0km
14hrs 27mins
Mild
Carb per hour: 59g
Sodium per hour: 281mg
Fluid per hour: 413ml
Relative sodium concentration: 679mg/L
View Sarah's Numbers1st
RunningUltra
18th October, 2025
IAU 24h World Championships
Sarah Webster
278.6km
24hrs
Cold
Carb per hour: 48g
Sodium per hour: 103mg
Fluid per hour: 294ml
Relative sodium concentration: 349mg/L
View Sarah's Numbers1st
RunningUltra
18th October, 2025
IAU 24h World Championships
Sarah Webster
278.6km
24hrs
Cold
Carb per hour: 48g
Sodium per hour: 103mg
Fluid per hour: 294ml
Relative sodium concentration: 349mg/L
View Sarah's Numbers