The purpose of this study is to analyze biomechanical mechanisms (posture, center of gravity, electromyography and plantar pressure distribution) of Romanian deadlift exercises for bodybuilders and the general public, and to provide preliminary data for the minimization of exercise injuries.These are the results of this study: first, the 1st section was longer than the 2nd in the time required by phase without statistically significant differences between groups; second, the skilled group had the center of gravity positioned further behind E2 compared with the unskilled; third, there were no statistically significant differences in the angle of anteversion of the moving body; fourth, the skilled group had muscle activity ratio in order of erector spinae muscles, gastrocnemius and musculus vastus lateralis in the 1st section, while the unskilled in order of trapezius muscles, erector spinae muscles and gastrocnemius, with significant differences in trapezius muscles between the two groups (p<.05) and no significant differences between the two groups in the 2nd section; finally, both the skilled and unskilled groups had the greatest in A3 and the least pressure distribution in A2 in the 1st section, but there were no significant differences.The results above indicate that additional biomechanical postures are necessary as differences between the skilled and unskilled groups are not large enough.