Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 49 9 2020 08 23 1631 1636 EN Checheong RYEW Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Republic of Korea Seunghyun HYNU Department of Kinesiology, College of Natural Science, Jeju National University, Jeju, Republic of Korea 2018 07 20 2019 02 19 Background: Gait mechanism due to overloaded weight of the obese may be altered, but yet uncertain whether an added loaded weight on body weight can alter or not gait characteristics. Methods: We applied with 0 kg (no load), 5 kg, 10 kg, and 15 kg of the load carriage respectively on the obese (n=11) to grasp a mechanism on the control of impact types and dynamic stability during gait. Gait characteristics was analyzed with three-dimensional cinematography and ground reaction force system consisted of a length of 1 stride, mean velocity of center of gravity during supporting phase, breaking force, propulsive force, dynamic posture stability index (DPSI), and extrapolated centre of mass (XCoM) respectively. We performed repeated measures one-way analysis of variance (0 kg, 5 kg, 10 kg, and 15 kg) and performed the post hoc test (Duncan) at (P<0.05) in case of significant level respectively. Results: Onestride length and mean velocity were decreased according to gradual increase of a load carriage, but breaking and propulsive force were somewhat increased. Particularly a decrease of gait velocity and stride length kept the range for DPSI and XCoM theta of a level of no-load carriage. Conclusion: Usually load carriage during prolonged time of the obese is few case, but rather a load carriage of 5 kg may alter a gait posture potentially with prolonged time of load carriage. https://ijph.tums.ac.ir/index.php/ijph/article/view/14111 https://ijph.tums.ac.ir/index.php/ijph/article/download/14111/6969