The study will aim to describe and evaluate the effect of chronic beetroot juice supplementation on acute mountain sickness symptoms and exercise in a hypoxic environment. It is hypothesized that beetroot supplementation will decrease acute mountain sickness and increase exercise performance.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
TRIPLE
Enrollment
23
School of Sport, Health and Exercise Sciences, Bangor University
Bangor, Gwynedd, United Kingdom
Acute Mountain Sickness (AMS-C) as Assessed by the Environmental Symptoms Questionnaire.
Acute Cerebral Mountain Sickness score (AMS-C) calculated from the 11-item Environmental Symptoms Questionnaire (ESQ; Sampson et al., 1994). Participants rate the severity of each item from zero to five, and the ratings were multiplied by their factorial loadings and summed. Unabbreviated scale title: Acute Cerebral Mountain Sickness Abbreviated title: AMS-C Unit of measure: Scores on a scale Minimum value: 0 Maximum value: 5 Interpretation: Higher scores mean a worse outcome
Time frame: Measured on the fifth day of supplementation with a six-hour exposure to hypoxia
Hypoxic Exercise Performance as Assessed by Time to Exhaustion at 80% of Hypoxic V̇O2max Reserve.
On day six of each supplementation protocol, participants completed a time to exhaustion test at 80% of their hypoxic V̇O2max reserve in acute hypoxia (FiO2 14.1%, equivalent 3225 m). Maximal exercise performance is defined as time to exhaustion (TTE) determined by the time from onset of test to task failure (volitional exhaustion or inability to maintain treadmill speed).
Time frame: Measured on the sixth day of supplementation
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