NCT05330481

Body Weight and Carb Metabolism

Exploring the Role of Body Mass in Exogenous Carbohydrate Oxidation Rates During Exercise

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 20 (actual)
• Sponsor: University of Bath · Academic / Other
• Sex: All
• Age: 18 Years – 60 Years
• Healthy volunteers: Accepted

Summary

Whilst theoretically, body size should influence the capacity for intestinal carbohydrate absorption and thus exogenous oxidation rates during exercise, there is currently little empirical evidence to support this hypothesis. Accordingly, current nutrition guidelines for carbohydrate intake during exercise do not take body mass into account. Therefore, there is a need to establish whether body mass is related to exogenous carbohydrate oxidation rates during exercise. If such a relationship is established, this would lay the foundation to revise the current sports nutrition guidelines regarding carbohydrate intake during exercise. The aims of this study are, therefore, to: 1) establish whether larger individuals display higher rates of exogenous carbohydrate oxidation than smaller individuals; and 2) establish if such a difference can be explained by the higher absolute exercise intensity, and thus the energy demand of exercise. It is hypothesised that larger individuals will demonstrate higher exogenous carbohydrate oxidation rates than smaller individuals, and that this difference will be partly (but not completely) diminished when the absolute intensity of exercise is matched.

Conditions

• Exercise Metabolism

Interventions

Type	Name	Description
OTHER	Moderate-intensity (relative) exercise with glucose ingestion	120 minutes of cycling at 95% of lactate threshold ingesting 90 g/h of glucose
OTHER	Moderate-intensity (absolute) exercise with glucose ingestion	120 minutes of cycling at a power matched to participant in the \<70 kg body mass group, ingesting 90 g/h of glucose

Timeline

• Start date: 2022-03-01
• Primary completion: 2024-04-27
• Completion: 2024-07-27
• First posted: 2022-04-15
• Last updated: 2024-09-19

Locations

1 site across 1 country: United Kingdom