<unk>  is the injury occurring to muscles or tendons. Due to<unk> , the tendons and muscles supporting the spine are twisted or pulled. Chronic<unk>  occurs because of the sustained trauma and wearing out of the back muscles Acute<unk>  can occur following a single instance of over stressing of back muscles, as in lifting a heavy object. Chronic<unk>  is more common than the acute type. To avoid<unk>  it is important to bend the knees whenever you lift a heavy object – see partial squats.
Back strain
Back injury
Facet syndrome
Sacral fracture
Sprained ankle
Tennis injuries
Elbow fracture
Medial knee injuries