RESULTS The group means and SDs obtained in pre and post recordings are given in Table 1
The whole group (n=26) showed a significant decrease in breath rate after the two day program, with no other changes. The polygraph data of subjects with OSI greater or less than the median (= 24.5) were analyzed separately. Subjects with OSI more than median (n = 13) showed a significant decrease in breath rate, in the power of the low frequency component of the heart rate variability spectrum, and in the low frequency; high frequency ratio (LF/HF). In these subjects the power of the high frequency component was significantly. More after the program. In contrast, the subjects (n = 13) with OSI less than the median, showed no changes after the program. There was no correlation between the OSI at baseline and polygraph measures (I) at baseline and (ii) recorded post compared with pre.