Carlucci Flaminia, Orlando Giorgio, Haxhi Jonida, Laudani Luca, Giombini Arrigo, Macaluso Andrea, Pigozzi Fabio, Sacchetti Massimo
From the Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Rome (FC, GO, JH, LL, AM, FP, MS); and Department of Medicine and Health Sciences, University of Molise, Campobasso, Italy (AG).
Am J Phys Med Rehabil. 2015 Jul;94(7):522-9. doi: 10.1097/PHM.0000000000000193.
The aim of this study was to compare the optimal vibration frequency (OVF), which corresponds to maximal electromyographic muscle response during whole-body vibration, between young, middle-aged, and older women in four muscles of the lower-limbs.
OVF was measured as the frequency corresponding to maximal root mean square of the surface electromyogram (RMSmax) during a continuous incremental protocol, with a succession of vibration frequencies from 20 to 55 Hz (A = 2 mm), on the vastus lateralis, vastus medialis, rectus femoris, and gastrocnemius lateralis muscles of the dominant lower-limb. Seventy-eight women were divided into three age groups, that is, young, 21.6 ± 2.4 yrs; middle aged, 43.0 ± 5.2 yrs; and older, 74.2 ± 6.0 yrs.
OVF in the vastus medialis was lower in the older women than in the middle-aged and young women, whereas OVF in the vastus lateralis was lower in the older than in the young women. There were no differences in OVF between muscles within each group. RMSmax was higher in the older than in the young women in all muscles.
Age range should be taken into consideration when determining OVF because it decreases with age. Properly individualizing the vibration protocol might greatly influence neuromuscular effects of vibration training.
本研究旨在比较年轻、中年和老年女性下肢四块肌肉在全身振动过程中对应最大肌电图肌肉反应的最佳振动频率（OVF）。
在连续递增方案中，以20至55赫兹（A = 2毫米）的一系列振动频率，对优势下肢的股外侧肌、股内侧肌、股直肌和腓骨外侧肌进行测量，将OVF测定为对应表面肌电图最大均方根（RMSmax）的频率。78名女性被分为三个年龄组，即年轻组，21.6±2.4岁；中年组，43.0±5.2岁；老年组，74.2±6.0岁。
老年女性股内侧肌的OVF低于中年和年轻女性，而老年女性股外侧肌的OVF低于年轻女性。每组内各肌肉之间的OVF没有差异。所有肌肉中，老年女性的RMSmax均高于年轻女性。
确定OVF时应考虑年龄范围，因为它会随着年龄增长而降低。适当地个性化振动方案可能会极大地影响振动训练的神经肌肉效应。
