The Effects of Walking Speed on the Biomechanics of Backpack Load Carriage

摘要: Abstract : An analysis of the effects 3 walking speeds (1.17, 1.33, and 1.50 m/s) on gait during backpack load carriage was performed 16 male volunteers using a cinematographic system, force platform, tri-axial accelerometer, 6 surface electrodes located over trapezius, spinal erector, quadricep, hamstring, gastrocnemius tibialis anterior muscles. Conclusions: (1) As speed increased: (a) there greater knee flexion at heel-strike, probably reducing shock, (b) hip position toe-off became more extended, as rear leg pushed off to degree front stretched further forward, (c) total arm swing, most which accounted for by increased swing in rearward direction, (d) minimum vertical body center mass declined, (e) were upward downward velocities, necessitated stride frequency range motion, (f) changes occurred technique that kept several ground reaction forces lower than proportional increase speed, (2) greatest percentage joint torque with about hip, least ankle, indicating muscles producing involved increasing those ankle involved. The electrical activity data from supported findings. Increase effected much through horizontal force, (3) while amplitude muscle tended patterns remained same, (4) eccentric heel-strike controlled rate plantarflexion prevent foot slapping against ground, proportionally speed.