High-intensity interval training (HIIT), specifically IHHT protocols, can enhance performance and recovery in over-trained endurance athletes.

“Performance and recovery Enhanced recovery in over-trained endurance athletes A study involving 15 endurance athletes diagnosed with overtraining syndrome. IHHT protocol: Three weekly sessions for a duration of four weeks. Each session consisted of 6-8 cycles of 10% hypoxia and 30% hyperoxia. Key findings Improved Exercise Performance: Participants showed a 12% increase in maximum wattage. Enhanced Recovery: Recovery was significantly improved, as indicated by a 4.7-fold decrease in the sympathetic/parasympathetic index (LF/HF). Blood Markers: No changes were observed in blood markers such as red blood cell count or hemoglobin levels.”