Efficacy of an Asynchronous Telerehabilitation Programme in Post-COVID-19 Patient

Adherence level. Adherence will be measured in days of exercise performance by means of a diary questionnaire. Adherence will be coded 0=if on that day they have not done what was prescribed, 1= if they have done some exercise, 2=if on that day they have carried out all the activity prescribed, 3= if they have carried out additional activity.

Engagement level. Engagement will be measured in days of exercise performance by means of a diary questionnaire. Engagement will be coded 0=if on that day they have not done what was prescribed, 1= if they have done some exercise, 2=if on that day they have carried out all the activity prescribed, 3= if they have carried out additional activity.

Satisfaction will be measured with a brief interview using a Likert scale. Satisfaction will be recorded on a Likert scale from 0=very dissatisfied to 4=very satisfied.

Incidents will be measured with a brief interview. The number of incidents and whether or not it has influenced adherence shall be recorded.

Maximum leg strength endurance for 30" will be measured with the strength with the 30" Sit-To-Stand (STST). To perform the 30" Sit-To-Stand, from a sitting position, patients will rise and return to the starting position as many times as possible within 30 seconds.

Maximum arm strength endurance for 30" will be measured with the 30" Arm Curl Test (ACT). To perform the Arm Curl Test, from a sitting position, as many elbow flexion-extension movements of dominant limb as possible should be performed in 30 seconds with a 2 kg weight.

Submaximum aerobic capacity walking for 6 minutes will be measured with the 6-Minutes Walking Test (6MWT). In the 6-Minutes Walking Test, patients are asked to walk the maximum possible distance for 6 minutes.

Functional capacity will be measured with the Post-COVID Functional Status Scale (PCFS). In the Post-COVID Functional Status Scale, the levels range from 4 level that means severe functional limitations to 0 that means no limitations and no symptoms."D" level means death.

Depression, anxiety and stress will be measured with the Depression, Anxiety and Stress Scale (DASS-21). In this scale, each item is answered according to the intensity of each symptom suffered in the last week on a Likert scale from 0 to 3 points. The global scale contains three different blocks for: depression, anxiety and stress. Each block has seven items. The global scale score ranges from 0 to 21 points. In the Depression, Anxiety and Stress Scale, higher scores indicate higher levels of stress, depression and anxiety.

Self-efficacy will be measured with the General Self-efficacy Scale (GSES).The General Self-efficacy Scale consists of 10 items with a minimum score of 10 points and a maximum of 50 points with Likert-type responses. In the GSES, the higher score indicates higher perceived general self-efficacy.

Behavior in sport will be measured with the Behavioral Questionnaire in Sport (BRSQ) (36-item version). The Behavioral Questionnaire in Sport measures extrinsic motivation through different factors depending on whether the patient performs physical activity because they believe that it is part of a healthy lifestyle (integrated regulation), because they believe that the activity is important but not pleasant (identified regulation), because of feelings of guilt (introjected regulation) and / or external pressures (external regulation). Intrinsic motivation is measured by three factors, knowledge, execution, and stimulation. Another factor it measures is demotivation. This scale is validated in the Spanish context. Its items are valued using a Likert scale that ranges from 1 (not at all true) to 7 (very true).

Perceived social support will be measured with the Multidimensional Scale of Perceived Social Support (MSPSS). The Multidimensional Scale of Perceived Social Support is validated in the Spanish population by Landeta and Calvete, obtaining high psychometric properties. It is considered a priority scale to be applied in people who are in the process of recovery. It measures social support in three dimensions (family, friends and significant others) and also provides a final score. The version used consists of 12 items that are answered using a Likert scale that ranges from 1 (totally disagree) to 7 (totally agree).

Changes in the quality of life. Quality of life will be measured with the Short Form Health Survey (SF-12-v2). It consists of 12 likert-type items ranging from 1 to 6 points. In the Short Form Health Survey, a higher score indicates a higher self-perceived quality of life.