Normal Subjects Clinical Trial
Official title:
Acute Effects of Artificial Sweeteners' or Sugar's Ingestion on Hemodynamic and Metabolic Stress Response: An Exploratory, Randomized, Cross-over Trial in Healthy Young Women.
This exploratory study aims at investigating the acute effects of artificially sweetened and sugar beverage consumption (as compared to water consumption) on acute hemodynamic and metabolic stress response.
This single-center study included five visits. The first two visits (screening and
familiarization) allowed checking the eligibility of the volunteers. In case of inclusion,
the subjects were assigned to a sequence of three experimental conditions (water, sugar and
artificial sweeteners), in a randomized, crossover design.
The experimental test was divided into 5 stages:
1. a 90 minutes baseline period (t=0-90 min),
2. a 30-min mental stress (MS; t=90-120 min), consisting in 5-min periods of Stroop's color
word conflict test alternated with 5-min periods of mental arithmetic test.
3. a 30-min MS recovery period (t=120-150),
4. a 3-min cold pressure test (CPT) was carried out, aiming at immersing one volunteer's
forearm in an ice water container at 3°C,
3) a 15-min CPT recovery period (t=120-150). 60 min after the beginning of the metabolic
test, volunteers will drink 25 mL every 15 min, after 10-sec mouth rinsing, of either an
artificially- or sugar-sweetened beverages or water (control).
Hemodynamic stress responses will be measured by repeated blood pressure, heart rate and
cardiac output. Repeated venous blood samples will allow to assess metabolic stress
responses.
Each condition (water, artificial sweeteners and sugar) will be preceded by a 2-day run-in
period.
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