Herbert L M, Engsberg J R, Tedford K G, Grimston S K
Human Performance Laboratory, University of Calgary, Alberta, Canada.
Phys Ther. 1994 Oct;74(10):943-50. doi: 10.1093/ptj/74.10.943.
Differences, if any, in energy costs during walking of children with below-knee amputations (BKAs) and those of children without amputations have not been quantified. The purpose of this investigation was to compare measures of heart rate and oxygen consumption during walking (1) between children with BKAs and long residual limbs and children with BKAs and short residual limbs and (2) between children with BKAs and children without amputations.
Twenty-four children volunteered to participate in this investigation. Ten of the children, aged 6 to 18 years, had BKAs, and 14 children, aged 6 to 17 years, were without amputations.
The subjects walked for 2 minutes at each of the following four speeds: (1) chosen walking speed (CWS), (2) 20% below CWS, (3) 20% above CWS, and (4) fixed speed of 1.2 m/s. Heart rate and oxygen uptake were measured at each speed.
The results indicated (1) that there were no significant differences between children with long residual limbs and those with short residual limbs; (2) that oxygen consumption was 15% greater for children with BKAs compared with children without amputations; (3) that there were no differences in heart rates between children without amputations and those with BKAs or within children with BKAs; and (4) that children with BKAs did not choose speeds different from their peers without amputations, regardless of stump length.
The results indicated that children with BKAs had higher energy needs for walking than children who had no amputation. Whether the increased energy needs prevent or inhibit children with BKAs from having a lifestyle comparable to that of children without amputations is currently unknown and warrants further research. [Herbert LM, Engsberg JR, Tedford KG, Grimston SK. A comparison of oxygen consumption during walking between children with and without below-knee amputations.
膝下截肢（BKA）儿童与未截肢儿童在行走过程中的能量消耗差异（若存在）尚未被量化。本研究的目的是比较（1）长残肢BKA儿童与短残肢BKA儿童以及（2）BKA儿童与未截肢儿童在行走过程中的心率和耗氧量指标。
24名儿童自愿参与本研究。其中10名6至18岁的儿童为BKA患者，14名6至17岁的儿童未截肢。
受试者以以下四种速度各行走2分钟：（1）自选行走速度（CWS），（2）低于CWS 20%的速度，（3）高于CWS 20%的速度，以及（4）1.2米/秒的固定速度。在每个速度下测量心率和摄氧量。
结果表明（1）长残肢儿童与短残肢儿童之间无显著差异；（2）BKA儿童的耗氧量比未截肢儿童高15%；（3）未截肢儿童与BKA儿童之间以及BKA儿童内部的心率无差异；（4）无论残肢长度如何，BKA儿童选择的速度与未截肢的同龄人没有差异。
结果表明，BKA儿童行走时的能量需求高于未截肢儿童。目前尚不清楚能量需求的增加是否会阻止或抑制BKA儿童拥有与未截肢儿童相当的生活方式，这值得进一步研究。[赫伯特·L·M、恩斯伯格·J·R、特德福德·K·G、格里姆斯特恩·S·K。膝下截肢儿童与未截肢儿童行走时耗氧量的比较。
