Inclusion Criteria:

• • Participant is willing and able to give informed consent for participation in the study.

  • Male or Female, aged 65 years or above.
  • Diagnosed with CHF for at least 1 year (Signs and symptoms of HF & either LVEF <40% or LVEF ≥40% with evidence of structural cardiac abnormality on echocardiogram including increased left atrial size, LV hypertrophy or impaired LV filling and/or raised natriuretic peptides: B-type natriuretic peptide (BNP) <35 pg/mL/ N-terminal pro-B-type natriuretic peptide (NT-proBNP) <125 pg/mL)
  • CFS ≥5
  • Willing to actively engage in a 12-week intervention developed by our team targeting older people with frailty and CHF
  • Willing to wear a wrist accelerometer for 7 days before the intervention as well as during the 12-week intervention to assess physical activity profile and monitor adherence to exercise programme
  • Willing to comply with all study requirements.
  • Willing to allow his or her General Practitioner and consultant, if appropriate, to be notified of participation in the study
  • Willing to provide feedback regarding the intervention in the form of interview/ focus groups/ surveys to help refine the intervention
  • Willing for audio recordings or note taking to take place during interviews/ focus groups

Exclusion Criteria:

• • Any other significant disease or disorder which, in the opinion of the Investigator, may either put the participants at risk because of participation in the study.

  • Significant cognitive impairment that affects the participant's ability to adhere to intervention.
  • Recent wrist fracture or operation that affects the participant's ability to wear a wrist accelerometer
  • Recent injury or operations that would significantly reduce the participants ability to engage in their normal daily activities
  • Participants who are currently recruited into another research study involving a lifestyle intervention
  • Participants who are undergoing major operations during the 12-week intervention
  • Participants unable to give informed consent