Veilleux L N, Rauch F, Lemay M, Ballaz L
Shriners Hospital for Children and Department of Pediatrics, McGill University, Montreal, Quebec, Canada.
J Musculoskelet Neuronal Interact. 2012 Dec;12(4):219-23.
Mechanography is an innovative method to evaluate lower-limb dynamic muscle function. This technique is generally performed on force platforms that measure only the vertical component of ground reaction force (GRF). The underlying assumption is that medio-lateral and antero-posterior forces do not contribute significantly to the GRF in jumping and rising tests. The goal of this study was to establish the validity of this assumption. Fifteen healthy adults (mean age [SD]: 30 [11] years; mean height [SD]: 1.68 [0.12] m; mean body mass: 70 [18] kg) performed three repetitions of five different tests in the following order: multiple two-legged hopping, multiple one-legged hopping, single two-legged jump, heel-rise test and chair-rise test. An excellent agreement was found between peak GRF and peak vertical GRF. In each of the five tests, peak vertical GRF represented more than 99% of peak GRF. Moreover, the limits of agreement ranged between 0.05% (multiple two-legged hopping test) and 0.4% (heel-rise test) of the averaged peak force measurements. Therefore measuring only the vertical component of ground reaction force in healthy participants is appropriate for the five tests used in the present study.
力学描记法是一种评估下肢动态肌肉功能的创新方法。该技术通常在仅测量地面反作用力（GRF）垂直分量的测力平台上进行。其潜在假设是，在跳跃和起身测试中，横向力和前后力对GRF的贡献不大。本研究的目的是验证这一假设的有效性。15名健康成年人（平均年龄[标准差]：30[11]岁；平均身高[标准差]：1.68[0.12]米；平均体重：70[18]千克）按照以下顺序对五种不同测试各进行三次重复：多次双腿跳跃、多次单腿跳跃、单次双腿跳跃、足跟抬起测试和从椅子上起身测试。研究发现，GRF峰值与垂直GRF峰值之间具有高度一致性。在这五项测试中的每一项中，垂直GRF峰值均占GRF峰值的99%以上。此外，一致性界限在平均峰值力测量值的0.05%（多次双腿跳跃测试）至0.4%（足跟抬起测试）之间。因此，对于本研究中使用的五项测试，仅测量健康参与者地面反作用力的垂直分量是合适的。
