Continuous glucose monitoring during a 100-km race: a case study in an elite ultramarathon runner. A Japanese group has measured blood sugar with two 100 km runners under load and examined whether there is a connection with the running speed. The two runners a sensor was implanted in the subcutaneous fat on the stomach and the sugar values could be measured so continuously.The one runner came after 6:51 h: min in the finish, the other after 8:56 h: min. The faster runner was around 90% of its lactic shaft, slower at around 78%.The faster runner took only 249 g of carbohydrates during the race, the slower, however, 366 g.
Although the faster runner has a few carbohydrates, his blood sugar remained constant than the slower runner with more supply. The very interesting case report is to be read under https://pubmed.ncbi.nlm.nih.gov/24896042/