Disability, lumbosacral sprain

1) lumbosacral sprain a leading cause of short-term work-related disability.

A lumbosacral sprain is a ligament injury in the lumbar or sacral areas (lower back). A sprain usually occurs after a forceful or rapid movement which overstretches and maybe tears a ligament.

prevention:
abdominal-muscle strengthening exercises

2)Herniated disc (lumbar hernia) 

What do you do for a herniated disc?

A combination of the following conservative treatment options can be used through at least the first six weeks of discomfort and pain:

1. Physical therapy, exercise and gentle stretching to help relieve pressure on the nerve root.
2. Ice and heat therapy for pain relief.
3. Manipulation (such as chiropractic manipulation)

Can physical therapy help a herniated disc?

PT may include deep tissue massage, hot/cold therapies, hydrotherapy, and exercise. Physical therapy often plays a major role in herniated disc recovery. Its methods not only offer immediate pain relief, but they also teach you how to condition your body to prevent further injury. 

http://myhomemedicine.com/secret-back-pain-feet-5-exercises-fix-everything/?t=viral