정상보행시 체중심의 수직 가속도 특성

Characteristics of Vertical Acceleration at Center of Mass of the Body in Normal Gait

In this study, vertical acceleration of center of mass was observed along normal gait phases in 9 healthy male volunteers (aged 25.7±2.18). The developed wireless accelerometric device was attached on the intervertebral space between L3 and L4 using a semi-elastic waist belt. A three-dimensional motion analysis system, synchronized with the accelerometry, was used for detecting gait phases. There was no significant correlation between the body weight and the acceleration. The first peak curve covered loading response phase. The second downward peak point was matched accurately with the opposite toe-off. In mid-stance and terminal stance, the acceleration curve highly resembled the vertical ground reaction force curve. There was no significant difference in timing between the final upward peak point and the initial contact. Therefore, the developed accelerometry system would be helpful in determining determine temporal gait patterns in patients with gait disorders.