Infective Endocarditis (IE) is a serious heart infection. This study looks at whether exercise can help people feel better after having IE. Participants will join a cardiac rehabilitation program where they'll exercise in a group with a physiotherapist (a special exercise teacher) twice a week for 12 weeks. They'll also fill out online health surveys four times in a year and talk about their experiences three times during the year.

To join, you must have had IE and be treated for it. You need to agree to participate and sign a form showing you understand the study. People who have certain mental illnesses or who cannot commit to the study may not be able to join.

• The study lasts 12 weeks of exercise, plus surveys and interviews over a year.
• Participants will attend exercise sessions twice a week.
• The study will include 50 patients who have had IE.