Table 2 Eligibility criteria based on PICO

Population

• Individuals with multiple sclerosis

• Individuals aged from 18 to 65 years

• Any sex

• Any surgery affecting the lower extremities or the spine in clinical history

Intervention

• Prolonged and/or exhaustive activity organized to lead to fatigue

• No postural control measured

Comparison

• Passive control groups or conditions

• Did not include a group or conditions as comparators for quantifying fatigue following the intervention

Outcome

• Studies investigating a relationship between fatigue and postural control (must include one of the following measures: center of pressure, the center of gravity, the center of mass, and other functional scales of postural control).

• Studies not investigating a direct relationship between fatigue and postural control