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In order to reduce and prevent back pain complaints and to form safe and comfortable daily activities during pregnancy, pregnant women need proper body mechanics. The purpose of this research is to know the influence of the application of mechanical body mechanics with lower back pain of the III trimester of pregnant women. This type of research is pre-experimental with one group Pretest posttest design. This research was conducted in the working area of Puskesmas Sangurara. The population in this study is all III-trimester pregnant mothers with a sample number of 31 people, taken with a consecutive sampling technique. The treatment given is the technique of body mechanics observed during 1 week. Data collection using an observation sheet. The results showed before performing mechanical body mechanics there were 71% of respondents experienced moderate pain and after conducting mechanical body mechanics there were 74.2% of respondents experienced mild pain. Based on the Wilcoxon test obtained a p-value

Stretching is one form of therapy needed to lengthen muscles that increase shortening or increase elasticity and enlarge muscles. Maintain muscles at their natural length and can maintain their function properly. This type of research uses a pre-experimental research design with the design of a pretest-posttest group that is there is no comparison group (control), but the first observation (pretest) has been made that allows research that can improve the changes produced after the study. The sample is part of the population to be excluded or part of the characteristics possessed by the population. How to take a sample by taking the entire sample of participation into a sample (total sampling) of 20 people. The decisive variable in this study is the rate of return of the lower back in the elderly. This research uses paired t statistical test with α