Sarcopenia and Training Outcomes in Post-cardiac Surgery Patients

The goal of this observational study is to assess the prevalence of sarcopenia and see whether the current care is sufficient to improve sarcopenia outcomes in patients after cardiac surgery. The main questions it aims to answer are: How prevalent is sarcopenia after cardiac surgery? Is the current standard of care sufficient to improve sarcopenia outcomes after cardiac surgery? Participants will: * Perform test to assess sarcopenia one day before leaving the hospital * Perform these tests again after 4 weeks, 16 weeks, and/or 1 year depending on their sarcopenia status at baseline and whether or not they will follow a cardiac rehabilitation program

Inclusion Criteria: * Hospitalized following cardiac surgery (i.e. hospitalization unit 18 and 22) * Stable with regard to symptoms * Eligible for cardiac rehabilitation according to current guidelines following hospital discharge * Voluntary written informed consent of the participant has been obtained * At least 18 years of age at the time of signing the Informed Consent Form (ICF) Exclusion Criteria: * Not eligible for cardiac rehabilitation according to current guidelines * Unable to perform the physical performance test due to physical or mental issues as up to decision by supervising cardiologist