How To Heal Broken Muscles?

Hi, MRI scan shows L4/5 bulge on right side - injured during heavy weight training (180 kilo lifts). After 7 months lower back pain nearly all gone, but still have not regained full strength in right leg (only about 60%). The quads and upper leg muscles are still not working well and are still smaller than other leg. Still cannot walk long distances like before injury- will the right leg muscles ever return to normal? - what can I do?