Hunter G R, Treuth M S, Weinsier R L, Kekes-Szabo T, Kell S H, Roth D L, Nicholson C
Department of Human Studies, University of Alabama at Birmingham 35294-1250, USA.
J Am Geriatr Soc. 1995 Jul;43(7):756-60. doi: 10.1111/j.1532-5415.1995.tb07045.x.
The objectives of this study were to determine the effects of a strength-training program on walking speed and relative muscular stress, as measured by normalized integrated electromyographic (nIEMG) activity, while carrying a box of groceries and standing from a chair.
Prospective intervention study.
Volunteer subjects from the community of Birmingham, Alabama.
Fourteen healthy women aged 60 to 77 years.
Sixteen weeks of total body strength conditioning.
Before and after 16 weeks of strength conditioning, the following variables were evaluated for all subjects: (1) strength, six isotonic tests and two isometric tests; (2) walking velocity; (3) nIEMG of the biceps while carrying a box of groceries; and (4) nIEMG of the rectus femoris while standing from a chair.
After the strength training program, subjects' isotonic strength increased significantly, an average of 52% on the isotonic tests and 31% on the isometric tests. Walking velocity also increased significantly (18%). nIEMG of the biceps decreased 36% while carrying a box of groceries. Rectus femoris nIEMG decreased 40% while standing and 47% while sitting.
After strength conditioning, healthy older women showed not only substantially increased strength but also improvements in walking velocity and the ability to carry out daily tasks such as rising from a chair and carrying a box of groceries.
本研究的目的是确定一项力量训练计划对步行速度和相对肌肉应激的影响，相对肌肉应激通过标准化积分肌电图（nIEMG）活动来衡量，同时要求受试者提着一箱食品杂货从椅子上站起来。
前瞻性干预研究。
来自阿拉巴马州伯明翰社区的志愿者受试者。
14名年龄在60至77岁之间的健康女性。
进行为期16周的全身力量训练。
在力量训练16周前后，对所有受试者评估以下变量：（1）力量，六项等张测试和两项等长测试；（2）步行速度；（3）提着一箱食品杂货时肱二头肌的nIEMG；（4）从椅子上站起来时股直肌的nIEMG。
力量训练计划结束后，受试者的等张力量显著增加，等张测试平均增加52%，等长测试平均增加31%。步行速度也显著提高（18%）。提着一箱食品杂货时肱二头肌的nIEMG下降了36%。从椅子上站起来时股直肌的nIEMG下降了40%，坐下时下降了47%。
力量训练后，健康的老年女性不仅力量大幅增加，而且步行速度以及完成诸如从椅子上站起来和提着一箱食品杂货等日常任务的能力也有所改善。
