Physical activity helps to improve health and prevent chronic diseases. However, the fatigue usually hampers the training and execution of physical exercises, especially in people with chronic fatigue syndromes (CFCs), such as persons living with HIV (PLWH). We hypothesize that the "activity pacing", i.e. the strategy to optimize daily physical activity into manageable exercises in a way that should not exacerbate fatigue symptoms, may help a progressive improvement in physical activity of a group of PLWH with fatigue symptoms. Motivation and adherence to exercise will be monitored through the use of digital supports.

Inclusion Criteria:

• of age ≥18 years;
• either sedentary or already practicing mild/moderate physical activity (at least 150 minutes of moderate-intensity physical activity throughout the week);
• able to sign the informed consent.

Exclusion Criteria:

The study will exclude HIV+ individuals:

• with any HIV-related disease requiring hospitalization in the 6 weeks before enrolment;
• with medical conditions (e.g. neurologic, muscular-skeletal, cardiovascular diseases) contraindicating non agonistic exercise, as established by a sport medicine specialist;
• currently abusing of substance or alcohol;
• already performing physical activity at higher level than the current WHO recommendations (30 minutes of moderate activity 5 times a week).