| Objective:The aim of this study was to explore the effect of bio-resonance on walking efficiency in normal youth,poliomyelitis sequela and hemiplegia as well as the effect of rehabilitation measure on disturbance of bio-resonance in polio patients.Subjects and Methods:Subjects Normal muscle model:Ten young male participants were involved in this study,average 16.2±2ys,mean height 1.73±0.1m and mean weight 56.1±7kg.Muscle flaccid paralysis model:Twelve young male students with poliomyelitis sequela were average 17±1ys,mean height 1.68±4.6m and mean weight 52.5±5.4kg.Muscle spasticity model:Ten hemiplegic participants were average 43.6±13.7ys,mean height 1.7±4.2 m and mean weight 70.5±9.5kg.Rehabilitation intervention model:Another ten polio participants were average 16.7±0.7ys,mean height 163.3±7.5m and mean weight 51.0±7.0kg.All clients with quadriceps femoris muscle strength measured grade 2 in manual muscle testing(MMT)were selected for the knee-joint-instability group.Ten age-matched normal subjects were selected for the healthy group.Oxygen cost and gait analysis were measured with the knee-joint-instability group performing free walking under three conditions:with KAFO,AFO and barefoot.The healthy group undertook free walking without orthosis.Methods The time-space parameters were collected by Motion Analysis System and oxygen cost was obtained by a Cosmed K4b2 portable gas analysis system.Meanwhile,the self-selected,comfortable walking frequency was recorded through three dimensional gait analysis system.All participants walked according to 80%(lower speed)and 120%(higher speed)comfortable walking frequency.Results:The comfortable walking frequency in normal subjects was 107.6±1.8 steps/min.Eighty percent and 120%comfortable walking frequency were 85.8±7.5 s/min and 128.6±10.5steps/min.The comparison of oxygen consumption in three conditions were significantly different(p＜0.01),and the oxygen cost(ml/m/kg)were 0.140±0.011, 0.193±0.049 and 0.192±0.035,respectively.Oxygen cost of two different walking frequency had significant increase(p＜0.05).Also,the comfortable walking frequency in Poliomyelitis was 101.3±8.5 steps/min.Low speed and high speed walking frequency were 0.42±8.5 s/min and 121.1±10.0steps/min(p＜0.001).The walking speed(m/min)was 65.5±8.1,53.4±5.2 and 74.5±9.5(p＜0.001).The comparison of oxygen consumption in three conditions were significantly different(p＜0.01),and the oxygen cost was lowest(0.23±0.04 ml/m/kg) in nature walking frequency(p＜0.05).However,the comfortable walking frequency was 107.6±1.8 steps/min in patients with hemiplegia.Low speed and high speed walking frequency were 85.8±7.5steps/min and 128.6±10.5steps/min.The comparison of oxygen consumption in three conditions were not significantly different(p＞0.05),and the oxygen cost(ml/m/kg)were 0.283±0.087,0.350±0.081 and 0.301±0.082,respectively.Oxygen cost of different walking frequency had not significant difference(p＞0.05). At last,the oxygen cost(0.264±0.049 ml/m/kg)is significantly reduced when walking with AFO compared to wearing KAFO and without any orthosis(p＜0.01)in the knee-joint-instability group.The oxygen cost decreased in the health group compared with the knee-joint-instability group walking with the three conditions(p＜0.01).Conclusions:There is an inheritate mechanism of bio-resonance on human walking,reflected by the lowest oxygen cost with nature walking rhythm. The change of walking rhythm may result in increase energy expenditure and decrease of work efficiency.The rehabilitation intervention by AFO can enhance walking efficiency by improving the walking rhythm,which is the sign for recovery of bio-resonance. |
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