Snyder-Mackler L, Delitto A, Stralka S W, Bailey S L
Department of Physical Therapy, University of Delaware, Newark 19716.
Phys Ther. 1994 Oct;74(10):901-7. doi: 10.1093/ptj/74.10.901.
Electrical stimulation has been shown to be effective in aiding the recovery of quadriceps femoris muscle force production after anterior cruciate ligament reconstruction. The actual dosage of stimulation (training intensity) has not been well described. The purpose of this investigation was to establish a dose-response curve for electrical stimulation regimens designed to improve quadriceps femoris muscle recovery in patients after anterior cruciate ligament reconstruction.
We analyzed data from a subsample (n = 52) of patients receiving electrical stimulation (N = 110) who were involved in a large, multicenter randomized clinical trial investigating treatment strategies designed to enhance quadriceps femoris muscle recovery. Fifty-two subjects (40 male, 12 female), with an age range of 15 to 43 years (mean = 25, SD = 7), participated in 4 weeks of quadriceps femoris muscle training using either portable, battery-powered home stimulators or console stimulators designed for clinical use. Training intensities were monitored by logging the electrically elicited knee extension torque and expressing this torque as a percentage of the uninvolved quadriceps femoris muscles' maximal voluntary contraction force. After the 4 weeks of training, isometric muscle torque was assessed and a dose-response curve was generated. The relationship between training intensity and quadriceps femoris muscle torque was assessed with Pearson Product-Moment Correlation Coefficients.
A significant, linear correlation was found between training intensity and quadriceps femoris muscle torque. Subjects training with console, clinical generators trained at higher intensities than those training with portable, battery-operated generators; such training resulted in higher quadriceps femoris muscle torque.
These results support the use of high-intensity electrical stimulation and do not support the use of low-intensity or battery-powered stimulators when the goal is recovery of quadriceps femoris muscle force production in the early phases of rehabilitation after anterior cruciate ligament surgery. [Snyder-Mackler L, Delitto A, Stralka SW, Bailey SL. Use of electrical stimulation to enhance recovery of quadriceps femoris muscle force production in patients following anterior cruciate ligament reconstruction.
电刺激已被证明有助于前交叉韧带重建后股四头肌力量产生的恢复。然而，实际的刺激剂量（训练强度）尚未得到充分描述。本研究的目的是为旨在改善前交叉韧带重建患者股四头肌恢复的电刺激方案建立剂量反应曲线。
我们分析了参与一项大型多中心随机临床试验的接受电刺激患者子样本（n = 52）的数据，该试验旨在研究旨在增强股四头肌恢复的治疗策略。52名受试者（40名男性，12名女性），年龄在15至43岁之间（平均 = 25岁，标准差 = 7），使用便携式电池供电的家用刺激器或专为临床使用设计的控制台刺激器进行了4周的股四头肌训练。通过记录电诱发的膝关节伸展扭矩并将该扭矩表示为未受累股四头肌最大自主收缩力的百分比来监测训练强度。在4周训练后，评估等长肌肉扭矩并生成剂量反应曲线。使用Pearson积矩相关系数评估训练强度与股四头肌扭矩之间的关系。
发现训练强度与股四头肌扭矩之间存在显著的线性相关性。使用控制台临床发生器训练的受试者比使用便携式电池驱动发生器训练的受试者训练强度更高；这种训练导致股四头肌扭矩更高。
这些结果支持在目标是前交叉韧带手术后康复早期恢复股四头肌力量产生时使用高强度电刺激，不支持使用低强度或电池供电的刺激器。[斯奈德 - 麦克勒L，德利托A，斯特拉尔卡SW，贝利SL。使用电刺激增强前交叉韧带重建患者股四头肌力量产生的恢复。
