Meinders M, Gitter A, Czerniecki J M
Puget Sound Veterans Affairs Health Care System, Seattle, WA, USA.
Scand J Rehabil Med. 1998 Mar;30(1):39-46. doi: 10.1080/003655098444309.
Impaired ankle plantar flexor (APF) function is a frequent cause of gait limitations, but the role of the APF in the forward propulsion of the body remains controversial. To better understand both the direct and indirect effects of the APF during push-off and through advancement of the leg, mechanical work and inverse dynamic analyses were performed on 8 normal subjects during level walking. During push-off, 23.1 joules (J) of energy were generated, primarily by the APF, but only 4.2 J of this energy is transferred into the trunk. Ankle plantar flexor work is primarily used to accelerate the leg into swing. Most of the energy, 18.6 J, is recovered by transfer into the trunk at the end of swing. The timing of the energy transfers relative to the trunk motion imply that the APF contributes to the forward kinetic energy of the trunk but that other mechanisms likely account for the work used to raise the trunk against gravity.
踝关节跖屈肌（APF）功能受损是步态受限的常见原因，但APF在身体向前推进中的作用仍存在争议。为了更好地理解APF在蹬离期以及腿部向前推进过程中的直接和间接影响，对8名正常受试者在平地上行走时进行了机械功和逆动力学分析。在蹬离期，产生了23.1焦耳（J）的能量，主要由APF产生，但其中只有4.2 J的能量转移到躯干。踝关节跖屈肌的功主要用于使腿部加速进入摆动期。大部分能量，即18.6 J，在摆动期末通过转移到躯干而回收。能量转移相对于躯干运动的时间表明，APF有助于躯干的向前动能，但其他机制可能解释了用于克服重力抬起躯干的功。
