Effects of Rehabilitation Combined With a Maintenance Program Compared to Rehabilitation Alone in Post-COVID-19

Change from baseline post-COVID-related symptoms at week 4 and week 19

The number of COVID-symptoms will recorded as well as their intensity will be rated on a scale from 0 \[not relevant\] until 10 \[very severe symptom\].

Time frame: Baseline, week 4, week 19

Change from baseline lung function at week 4 and week 19

following Parameters will be collected:Pimax

Time frame: Baseline, week 4, week 19

Change from baseline fatigue symptoms at week 4 and week 19

Fatigue Assessment Scale will be used

Time frame: Baseline, week 4, week 19

Change from baseline exercise capacity at week 4 and week 19

1-minute sit to stand test will be performed (maximum repetitions of squats in one minute)

Time frame: Baseline, week 4, week 19

Change from baseline physical activity at week 4 and week 19

Activity will be measure in steps per day using a wearable from Polar

Time frame: Baseline, week 4, week 19

Change from baseline quality of life at week 4 and week 19

EQ-5D-5L questionnaire will be used.

Time frame: Baseline, week 4, week 19

Change from the use of health care service at week 4 and week 19

Frequency of therapeutical, medical and psychological sessions will be documented.

Time frame: Baseline, week 4, week 19

Change from the use of medications at week 4 and week 19

Amount and kind of medication will be documented.

Time frame: Baseline, week 4, week 19

Change from rate of sickness at week 4 and week 19

Days of sickness will be documented.

Time frame: Baseline, week 4, week 19

Change from workability at week 4 and week 19

Work ability index will be used

Time frame: Baseline, week 4, week 19

Change from ICF functionality at week 4 and week 19

Indicators of rehabilitation status questionnaire (IRES-3) will be used.

Time frame: Baseline, week 4, week 19

Change from sleep quality at week 4 and week 19

Sleep quality will be assessed by using the Pittsburgh Sleep Quality Index (total score ranges from 0 to 21 with higher scores indicating higher impairment)

Time frame: Baseline, week 4, week 19

Change from depression symptoms at week 4 and week 19

Patient Health Questionnaire 9 will be used. The total score ranges from 0 to 27 points with higher scores indicating worse Depression symptoms

Time frame: Baseline, week 4, week 19

Change from anxiety symptoms at week 4 and week 19

Generalized Anxiety Disorder Scale 7 will be used. The total score ranges from 0 to 21 points with higher scores indicating more anxiety symptoms

Time frame: Baseline, week 4, week 19

Change from resilience at week 4 and week 19

Resilience scale RS-13 will be used.

Time frame: Baseline, week 4, week 19

Change from cognition at week 4 and week 19

Cognition will be measured via the software RehaCom (by Hasomed GmbH).

Time frame: Baseline, week 4, week 19

Change from cognitive impairment at week 4 and week 19

Cognitive impairment will be measured by Montreal Cognitive Assessment (MoCA)

Time frame: Baseline, week 4, week 19