After eating carbs, scientists measured changes in blood flow and nerve signals in the lower leg using special tools, and saw all the changes happen within two hours.
Scientific Claim
In healthy adults, the vascular and sympathetic responses to carbohydrate ingestion occur within 2 hours and are measured in the calf muscle vascular bed using venous occlusion plethysmography and peroneal microneurography.
Original Statement
“Fifteen healthy subjects were studied for 2h following ingestion of a carbohydrate meal. Calf vascular resistance was measured by venous occlusion plethysmography, and muscle sympathetic nerve activity was assessed by peroneal microneurography.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim reports only what was measured and when, as explicitly stated. No inference or causal language is used, so it is appropriately stated with associative verb strength.
Evidence from Studies
Supporting (1)
After eating carbs, the body releases insulin, which makes blood vessels in the leg widen to help absorb sugar, even though the nervous system also tries to tighten them—this study measured both effects in the calf within 2 hours.