A Clinical Study of physical Therapy on the Low Back Conditions J. B. Rhee, S. K. fang, D. J, Han Low back pain usually is due primarily to a faulty mechanics, ,dis'c disease and other contributing factors .Conservative treatment of low back pain is considered to be useful with applicationes physical therapeutic measures including elimination of gravity, but surgical treatment is alternative to conservative .This study 1s conducted to analyse and evaluate efficiency of physical therapy on the low back pain on 452 cases who were treated at the Korea University Hospital, from January 1, 1978 to December 31. 1978.The results obtained in this study are summarized as follows :1. Sex distribution of total rationㄷs surveyed showed that 5l.3% in male and 487% in female.2 . In the age distrbution. the mest Liedominant age group was 25-54 years with7O.8 % .3 . The most proportion of the cases by occupation was housewife 27.7%, clerical and office workers 2l.7% , students 12.8% and labours 12.2 % respectively .4 . The most common causes of low back conditions classified, the Strain or Trau-rla revealed the highest frequency with 58.4% and thc Herniated Nucleus Pulpe-sus with 29.2 % of the total.5 . The modalities of physical therapy suitable to each cases were applied : 94.0%of all cases were treated with deep thermotherapy, 91.4 % hydrocollator steampack, 86.7% strengthening exercise of the weak muscles, pelvic traction 34.1%.6 . In regard to the duration required for the physical therapy. Herniated Nucleus Pulposus were approximately 4 weeks and strain or trauma were 2 weeks.7 . The improvement by physical therapy on lcw back conditions was classified in-to 41grades and showed following reaulits , excellent 42.5%, good 37.8%, fair 13.7% and poor 6.0% respectively.