REDUCED FUNCTIONALITY AND KINESIOPHOBIA IN PATIENTS WITH HEART FAILURE: USE OF ALTERNATIVE THERAPEUTIC STRATEGIES

Study 1 (double-blind randomized clinical trial) will be developed by recruiting individuals with chronic HF NYHA III-IV at the Hospital Nova Esperança (HNE), in the city of João Pessoa, state of Paraíba, Brazil, through advertising at the hospital where the participants' assessments will be performed (including patients who meet the study's eligibility criteria after hospital discharge). These individuals will be invited to participate in the study and instructed on its due procedures. To ensure the safety of the participants and reliability of the data, the medical records will be checked beforehand to ensure the necessary criteria are met. The researchers who will contribute to the study will be trained to perform the assessment of the participants, as well as to apply the LF and MF NMES protocol. The training will be offered by qualified professionals and the sequence and method of conducting the assessment and the NMES protocol will be recorded for the researchers involved. Strategies will be developed in advance to better organize the days, times, and logistics that seek to facilitate and optimize the conduct of the research, and will be planned according to the specificities of each researcher. Potential participants will be identified at the HNE together with the professionals of the service, who will maintain constant attention to identify patients who are eligible after their discharge. Once identified, they will contact the researchers to inform them, and the researcher responsible for this demand will go to the patient to provide explanations about the research, evaluate them, and ask for their telephone number to contact them after discharge. Other forms of recruitment will occur through active search in the aforementioned establishments and on social media. Randomization will be through the website randomization.com by a researcher who will not inform the evaluators, intervention researchers, or even the researcher who will perform the statistical analysis, about the groups in which these participants are located, leaving them blind. During randomization, participants will be allocated to three distinct groups: Intervention Group 1 (IG1): LF NMES protocol; Intervention Group 2 (IG2): MF NMES protocol; and Control Group (CG): NMES protocol without generation of muscle contractility. Four evaluators will participate in the study: researcher 1 will be responsible only for the evaluations, researchers 2 and 3 for the home application of the NMES protocols, and researcher 4 for randomization. The study will be double-blind, since researcher 1 and the participants will not be aware of the allocation of the subjects into the groups or the effects of the intervention. After the groups are formed, the research participants will be invited to come to the HNE outpatient clinic to perform the first day of evaluation before the start of the protocol. The evaluator will be a properly trained researcher who is blind to the intervention allocation group. This evaluation will include: personal, socioeconomic, and demographic data; collection of clinical data (history of the disease, ECHO results, and medications in use); vital signs (HR, RR, SpO2, and BP); lung, diaphragmatic, and quadriceps muscle ultrasound; lower limb perimeter; EMS of quadriceps muscles; 6MWT; application of the Lawton Scale and the Minnesota Living with Cardiac Insufficiency Questionnaire. After the day of the first assessment, the application of the GI1, GI2 and GC protocols will begin, which will occur for a total period of 8 weeks, 3 times/week, for 30 minutes on each day of application. The application days will be staggered, with a rest period between the scheduled days. The days and times will be assigned according to the availability of the participant and the researcher in charge. After 4 weeks of application of the protocol, they will return to the HNE outpatient clinic for a reassessment, which will have a specific day only for this purpose. After the reassessment, the application of the protocol will return. At the end of the 8 weeks, another reassessment will be performed, with the entire process being completed after 1 month of application of the protocol, with a follow-up. In research number 2, for the process of constructing and validating the questionnaire, studies with different methodological designs will be carried out in two consecutive stages. The first stage will begin with the identification of the items that will make up the questionnaire. These items will be identified from a qualitative study with patients eligible for the research, through a semi-structured interview (which will be recorded for later analysis). The interview will be conducted with a guide of open-ended questions (between 3-5 questions) about the perceptions and/or concrete experiences of patients regarding their possible capabilities, fears or fear of performing physical activity. Participants will be recruited during their hospitalization, and their participation in the research will also occur during this same period. Immediately after this stage, the questionnaire items will be constructed, based on the main perceptions identified in the qualitative study and in the process of discussion and consensus of the researchers involved. The format of the questions and answers of the questionnaire will be defined after analysis of the qualitative data. Once the first version of the questionnaire is finalized, it will undergo a pre-test to assess the understanding of the items by the volunteers and health professionals of the service. Everyone will report their perception regarding the understanding and relevance of the questions. An item will undergo reformulation if less than 80% of those evaluated classify the term as incomprehensible or inadequate. The second stage, which corresponds to The validation of the questionnaire will also be performed with patients diagnosed with HF admitted to the service. The questionnaire will be given to the patients by the researcher, who will explain its purpose. Participants will have two days to return the completed questionnaire, to avoid recall bias. The informed consent form must be signed in duplicate by all participants. The test-retest reliability will be assessed by completing the questionnaire again, three days after the first, in a small sample of participants, approximately 30 subjects. Subsequently, the questionnaire will be applied to a representative sample of the hospital population to analyze its convergent and divergent validity, comparing it with other instruments and/or functional tests, such as the Anxiety and Depression Scale (HADS), Quality of Life (Minnesota Living with Cardiac Insufficiency), Exercise Tolerance (TSL1) and Surface Electromyography. Finally, clinical data will be extracted from the participants' medical records, as well as their length of hospital stay and the total period of care provided by the on-call physiotherapist to the participant being evaluated.