Positives

• A patient said gentle EWOT sessions let them tolerate light movement again without the usual post-exertional crash, and energy slowly returned over weeks PMC.
  
  
• Someone reported that breathing high-flow oxygen during a recumbent bike pedal kept their pulse-ox above 95% so they could finally finish a short workout Health Rising.
  
  

Negatives

• A patient described pushing a single session too hard and triggering a multi-day PEM flare, noting EWOT does not protect against post-exertional malaise if pacing is wrong Mayo Clinic Connect.
  
  
• Some patients reported feeling light-headed or jittery during the first few sessions and needed to drop the intensity dramatically PMC.
  
  

Hurdles & Side Effects

• A patient said the home setup (concentrator, reservoir bag, mask) ran several thousand dollars upfront with no insurance coverage Health Rising.
  
  
• Patients with severe ME/CFS-overlap cases simply cannot tolerate the exercise component at all PMC.