The research article explores the effects of molecular hydrogen (H2) supplementation in the form of intermittent hydrogen-rich water (HRW) on muscular endurance performance in trained individuals. The study conducted at various universities in China involved 18 trained men aged around 19 years who consumed HRW or pure water daily for seven days, along with HRW or pure water during the training day. Participants engaged in half-squat exercises with specific loads and sets to assess muscular endurance. The results indicated that HRW supplementation led to significantly higher power output and a greater number of repetitions compared to the placebo group, demonstrating an enhancement in muscular endurance. However, the study also highlighted that while HRW intake improved performance, it did not show significant differences in fatigue recovery, as measured by indicators like countermovement jump (CMJ), total quality recovery scale (TQRS), and visual analog scale (VAS) scores. This suggests that HRW alone may not hasten recovery from muscle soreness or fatigue post high-intensity training. The findings suggest that intermittent HRW intake could be a beneficial strategy for boosting muscular endurance during resistance training or competitions. The study emphasizes the potential of HRW as a nutritional supplement for athletes and fitness enthusiasts aiming to enhance their physical performance. It is important to note that while HRW showed positive effects on performance, additional strategies might be needed to address post-training recovery effectively.