Fish oil and remote rehab: a new hope for long COVID sufferers?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * To have signed the informed consent form. * Age between 18 and 70 years with access to and knowledge of basic use of technological applications. * Patients with clinical criteria of having suffered from COVID-19 with diagnosis confirmed by diagnostic techniques and systems in health centers (PCR, rapid antigen test, and/or serology (positive anti-N antibodies). * Patients who remain symptomatic for more than 12 weeks after the onset of symptoms. * Patients who manifest symptoms compatible with CPCOVID since the end of the acute phase\*. * Patients with fatigue greater than or equal to an average of 4 points on the FSS. * Independent ambulation, even with the use of technical aids. Exclusion Criteria: * Patients with severe neurological diseases at the central and/or peripheral level that prevent them from following the program. * Patients with respiratory insufficiency: SaO2 \< 90% or respiratory rate ≧30. * Patients with rheumatic diseases or acute musculoskeletal injuries that do not allow exercise. * Patients who do not have access to the Internet or are unable to use the Internet on a daily basis. * Patients with clinical symptoms consistent with chronic fatigue syndrome (In the end, this criterion was not applied in the study) * Presence of symptoms consistent with CPCOVID prior to SARS Cov-2 infection. * Pregnant or lactating women or women of childbearing age who are trying to become pregnant. * Patients unable to follow oral and written instructions in Spanish. * Patients with an allergy to fish, shellfish, or any of the ingredients of the preparation. * Patients enrolled in another clinical trial for the treatment of symptomatology derived from COVID -19. * Patients who have completed another clinical trial in the 4 weeks prior to enrollment. * Patients who have received immunosuppressive medications and/or corticosteroids in the last 2 weeks prior to enrollment. Patients who have received nonsteroidal anti-inflammatory drugs (NSAIDs) continuously or on a fixed regimen in the 2 weeks prior to treatment initiation. Patients who have been taking NSAIDs may have a 7-day withdrawal period. * Women of childbearing age who are not willing to take NSAIDs should not be treated.