With those outcome measures it looks a bit of a dead duck.
I didn't list all the secondary outcome measures:
Observe changes in exercise tolerance and reduced post-exertional symptom exacerbation following incremental exercise
Modified De Paul Symptom Questionnaire-Post Exertional Malaise (DSQ-PEM), symptom Burden Questionnaire for Long COVID
53 days
Functional Status
Post COVID Functional Status Scale,
Impact on daily life subscale of the Symptom Burden Questionnaire for Long COVID
4 weeks
Explore whole-body FDG uptake using PET/CT methods in patients with Long COVID.
The standardised uptake volume (SUV) and Ki of 18FDG uptake observed during PET/CT scans.
53 days
Physical & Physiological function:
Impact on daily life subscale of the Symptom Burden Questionnaire for Long COVID, & DSQ-PEM.
Fatigue Assessment Scale (FAS), Medical Research Council (MRC)
Dyspnoea Scale.
Maximum inspiratory and expiratory mouth pressure, lung function, blood pressure, oxygen saturation, breathing rate, and resting heart rate, rate of perceived exertion and oxygen saturation.
53 days
Functional Status
Post-COVID Functional Status Scale,
6-minute walk test and timed up and go.
53 days
Cognitive Function
Perceived Deficit Questionnaire (PDQ-5) and Montreal Cognitive Assessment 'Blind' version (MoCA-Blind)
53 days
Biochemical/inflammatory markers
Full blood count, eGFR, LFTs, CRP, d-dimers, IL6, IL16, IL18, PCT, IFN-Y, TNF-A, VEGF-D, CRP, HLA-DP, and Vitamin D.
4 weeks
Emotional Status
Generalised Anxiety Disorder (GAD-7)
53 days
________________________
I agree it should be double blind placebo controlled.
Also the outcome measures are done at only 53 days (7 weeks and 4 days)
For a condition that is long lasting and fluctuating, that seems far too short. Surely they need a 6 month and 12 month follow up.