Selkowitz D M
Phys Ther. 1985 Feb;65(2):186-96. doi: 10.1093/ptj/65.2.186.
The purpose of this investigation was to determine if training isometrically with electrical stimulation (ES) alone would significantly increase isometric strength of the quadriceps femoris muscle. The relationships between the strength changes and the relative force and duration of training contractions were also studied. An experimental group (Group 1) and a control group (Group 2), 12 subjects in each, underwent pretesting and posttesting to obtain their maximum voluntary isometric contractions (MVICs). Group 1 trained with maximally tolerable isometric contractions induced by ES, three days a week for four weeks. Results showed that although both groups demonstrated increases in isometric strength of their quadriceps femoris muscles, training isometrically with ES produced a significantly greater increase (p less than .01) than not training with ES. The relative strength improvement in Group 1 was positively and significantly correlated with training-contraction intensity and duration. The relative increase in isometric strength, using only ES, may be determined by the ability of the subjects to tolerate longer and more forceful contractions. Suggestions for further research and implications for the clinical use of ES for strength-training are discussed.
本研究的目的是确定仅通过电刺激（ES）进行等长训练是否会显著增加股四头肌的等长力量。同时还研究了力量变化与训练收缩的相对力量和持续时间之间的关系。一个实验组（第1组）和一个对照组（第2组），每组12名受试者，进行了预测试和后测试，以获得他们的最大自主等长收缩（MVIC）。第1组通过ES诱导的最大可耐受等长收缩进行训练，每周三天，持续四周。结果表明，尽管两组的股四头肌等长力量均有所增加，但与不使用ES训练相比，使用ES进行等长训练的力量增加显著更大（p小于0.01）。第1组的相对力量改善与训练收缩强度和持续时间呈正相关且具有显著性。仅使用ES时，等长力量的相对增加可能取决于受试者耐受更长时间和更强收缩的能力。本文还讨论了进一步研究的建议以及ES在力量训练临床应用中的意义。
