In this randomized double-blind, placebo-controlled, crossover pilot trial, we evaluated the effects of 7-day H2 inhalation on exercise performance outcomes and serum hormonal and inflammation profiles in a cohort of young men and women.

All participants were allocated to receive either gaseous hydrogen (4%) or placebo (room air) by 20-min once-per-day inhalation for 7 days, with wash-out period of 7 days to prevent the residual effects of interventions across study periods. The primary treatment outcome was the change in running time-to-exhaustion from baseline to day 7. Additionally, assessment of other exercise performance endpoints and clinical chemistry biomarkers were performed at baseline and after 7 days after each intervention.

Inclusion Criteria:

Age ≥ 18 -35 years Body mass index 20 - 25 kg/m2 Free of major diseases Physically active Must be able to give written informed consent

Exclusion Criteria:

Use of any dietary supplements within 4 weeks before study commences Abnormal values for lab clinical chemistry (> 2 SD)

We will provide IPD on our University repository site