Soft-tissue injuryInjury to ligaments, tendons or muscle
LigamentConnects bone to bone; stabilizes joint
TendonAttaches muscle to bone
SprainLigament injury
StrainTendon or muscle injury
Grade (of both sprain and strain)

1 = Mild 

2 = Moderate; partial tear

3 = Severe; complete tear

Kinetic chainAn interrelated group of bones, muscles and joints that work together to perform movements. Basically, when one is in motion, it creates a chain of events affecting movement and stress on neighboring joints and segments.