from the study

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>There was no statistical difference in pulmonary function (spirometry, lung volume, etc.), and no statistical differences in any of the cardiovascular tests (echocardiograms, etc.) But the median distance walked in a six-minute walking test was lower for the post-Covid patients as compared to the controls (560 meters versus 595). But even then, the changes in walking distance did not correlate with PASC symptoms.

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the study draws the wrong conclusion, but the walking test does show the expected reduced exercise performance found in ME/CFS patients. The reason why PASC symptom intensity does not correspond with this reduction is because onset of malaise in ME/CFS is Post-Exertional, called Post-Exertional Malaise or PEM. If the symptom intensity had been measured again a day or two after the exercise test, the expected increase in symptom intensity would have been observed.

The majority of Long Covid patients are ME/CFS patients. learn about ME/CFS and you will understand why the study is incorrectly designed to test for ME/CFS.

The author's smugness about his "controversial" results are palpable and revolting. He's just deeply uninformed about the topic he is studying.