This study is an experimental research group. Compare before and after treatment The purpose is to study the effects of exercise programs with the promptings. To increase the strength of the back muscles and reduce muscle pain in the lower back. The sample group consisted of worker laundry.The University Phitsanulok female sample size of 40 set by the formula test the hypothesis proportion. divided into 2 groups including experimental group 20 people and control group 20 people which experimental groups will get the program to exercise after a period of eight weeks, with the prompting week one time and knowledge about low back pain, control group received about low back pain only. Comparing the average scores between groups by using Mann-Whitney U test and internal group by using Wilcoxon test.