Table 1. PICO Strategy.

PICO Strategy	Corresponding keyword
P (venous insufficiency)	“Venous Insufficiency”
I (therapeutic exercises)	“Therapeutic Exercise”, “Exercise Therapy”, “Exercise Therapy”
C (control group)
O (QoL, pain, and functionality)	“Quality of Life”, “Pain”, “Physical Functional Performance”, “Physical Performance”

PICO = Patients, Intervention, Comparison and Outcomes; QoL = quality of life.