Objective: To investigate the effects of micro hyperbaric oxygen intervention on physiological recovery and subsequent anaerobic performance after high-intensity exercise. Methods: A randomized crossover design was used to conduct two intervention experiments in 11 participants, with a one-week washout period set between experiments to minimize potential carryovereffects from the previous intervention. During the experimental period, participants completed two Wingate Anaerobic Tests (WAnT 1 and 2) with a 60minute interval between tests. During this interval, they were randomly assigned to receive either normobaricnormoxia (NN: 1.0 ATA, 20.93% O₂) or microhyperbaric oxygen (MH: 1.3 ATA, 40% O₂) for 60 minutes. Following each WAnT, peak power (P_P), mean power (P_M), maximal heart rate (HR_max), peak blood lactate concentration (BLa_peak), percutaneous arterial oxygen saturation (SpO₂), and ratings of perceived exertionwere recorded. Throughout the intervention, heart rate (HR), blood lactate concentration (BLa), and SpO₂ were measured every 10 minutes. Additionally, at the end of the intervention, the perceived recovery (PR) scale was used to assess the physiological recovery status. The experimental data are expressed as mean ± standard deviation (M ± SD), and the paired-samples t-test was used to compare within-group differences. Temporal variations in physiological parameters during the intervention were analyzed using two-way repeated measures ANOVA (condition × time), and the statistical significance level was set at p< 0.05. Results: 1) Under normobaricnormoxic conditions, the mean power output during the second Wingate anaerobic test was significantly lower than that during the first Wingate test (p< 0.05, d = 0.51); 2) under micro-hyperbaric oxygen conditions, no significant difference in mean power output was observed between the two Wingate anaerobic tests (p = 0.83); 3) blood lactate concentration and percutaneous arterialoxygen saturation differed significantly between the micro-hyperbaric oxygen and normobaricnormoxic conditions following the intervention (p< 0.05); and 4) the rating of perceived fatigue was significantly lower under the micro-hyperbaric oxygen condition than under the normobaricnormoxic condition (p< 0.05), whereas no significant differences were observed in post-exercise maximal heart rate or heart rate during the intervention between the two conditions (p> 0.05).Conclusion: Micro-hyperbaric oxygen intervention following high-intensity exerciseaccelerate blood lactate clearance, increasepercutaneous arterial oxygen saturation, andeffectively alleviate subjective fatigue, thereby facilitatingphysiological recovery and helping maintain subsequent anaerobic performance.