Hypoxia
Conditions
Keywords
Acute mountain sickness, Body composition,Hypoxia, Carbohydrate supplementation, Expedition,, Hydration,, Hypoxia, Performance
Brief summary
During a multi-week expedition to the Himalaya, we aim to investigate i) whether dietary supplementation with carbohydrate drinks and gels can improve physical performance; and ii) the underlying mechanisms for any observed changes in performance. We hypothesise that i) carbohydrate supplementation will improve physical performance; and ii) the underlying mechanism of this improvement in performance will include maintenance of body glycogen (sugar) stores, prevention of dehydration and decrease in the incidence of acute mountain sickness.
Interventions
DIETARY_SUPPLEMENTCarbohydrate energy drink
Complex carbohydrates including maltodextrin (97%) dissolved in water to make a a 10% solution, or dissolved in 25mL gels. Ad libitum. Twenty two days.
DIETARY_SUPPLEMENTAspartame
Aspartame dissolved in water, ad libitum, 22 days.
Sponsors
Bangor University
Science in Sport
Plans Branch of Headquarters Army Recruiting and Training Division
Medical Expeditions Ltd
Study design
Allocation
RANDOMIZED
Intervention model
FACTORIAL
Primary purpose
OTHER
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* a healthy enthusiasm for the outdoors and/or a passion for research in remote and difficult circumstances
Exclusion criteria
* Persons with Phenylketonuria
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Performance (time to complete a physical performance task) | Mid study |
Secondary
| Measure | Time frame |
|---|---|
| Hydration status | Pre, mid and post study |
| Body glucose stores | Pre, mid and post study |
| Oxygen delivery | Pre, mid and post study |
| Body composition | Pre, mid and post study |
| Spontaneous physical activity level | Pre, mid and post study |
| Rating of perceived exertion during a stepping task | Pre, mid and post study |
| Acute mountain sickness | Every day |
Countries
United Kingdom
Outcome results
None listed