The goal of this clinical trial is to evaluate if molecular hydrogen can reduce the metabolic response during graded exercise in healthy women aged 18-30 years. The main questions it aims to answer are: * Does molecular hydrogen reduce the respiratory exchange ratio? * Does molecular hydrogen reduce oxygen uptake? Researchers will compare molecular hydrogen to a placebo (ambient air containing no molecular hydrogen) to see if molecular hydrogen reduces the metabolic response. Participants will: * Inhale molecular hydrogen for 60 minutes each day for 7 days. * Undergo an exercise testing twice after a two-week washout period.
Age range
18 Years – 30 Years
Sex
FEMALE
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Respiratory exchange ratio
Timeframe: Change after 2 weeks of crossover.