The normal gait is largely devided by the stance phase and the swing phase, and each motion of joints and activities of muscles varies with the cycle of gait. The important parts in the gait determinants are motions of pelvic, knee and ankle joint, and the pathologic gaits are usually caused by unbalance of muscles, joint contracture, leg length discrepancy, spasticity and pain, etc.

There is no objective data on the normal and pathologic gait analysis with 3-dimensional motion analyzer by now in Korea. The authors measured the ROM of each joint on the parameters of gait with 3-dimensional motion analyzer in order to obtain the standard data of normal gait and furthermore to compare the normal gait with the pathologic gait.

The 10 normal men were the subjects of this investigation with 3-dimensional motion analyzer in Ergonomic Lab. of Korea Research Institute of Standard & Science.

The results were as follows;

1) The mean stride length of the subjects were 97.86cm.

2) The ratio of the stance phase to the swing phase were 57.8% to 42.2%.

3) The mean ROM of hip, knee and ankle joint were 153.8°, 170.4° and 100.1°, respectively, at initial contact on gait cycle.

4) The mean ROM of hip, knee and ankle joint were 159.7°, 167.2° and 90.9° respectively, at foot flat on gait cycle.

5) The mean ROM of hip, knee and ankle joint were 165.7°, 169.3° and 80.3° respectively, at heel off on gait cycle.

6) The mean ROM of hip, knee and ankle joint were 170.1°, 148.2° and 89.9° respectively, at toe off on gait cycle.

7) The mean ROM of hip, knee and ankle joint were 156.9°, 134.4° and 82.4° respectively, at mid swing on gait cycle.

8) The mean changes of ROM in normal gait were hip joint 20.7°, knee joint 50.7° and ankle joint 32.5° and knee joint showed the most various ROM changes.