A System for Lengthening Contraction Training of Muscle

延长肌肉收缩训练的系统

• 批准号: 7388852
• 负责人: Neil Martin Cole
• 金额: $ 39.07万
• 依托单位: BIO LOGIC ENGINEERING, INC.
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2010-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7388852
• 关键词: Acute; Address; Adult; Affect; Age; Agonist; Articular Range of Motion; Assisted Living Facilities; Beds; Clinic; Clinical; Clinical Trials; Community Hospitals; Computer software; Computers; Data; Data Storage and Retrieval; Elderly; Electronics; Engineering; Exertion; Feedback; Female; Fracture; Gender; Goals; Health Club; Institution; Institutionalization; Intervention; Isometric Contraction; Isometric Exercise; Lead; Leg; Length; Lifting; Logic; Marketing; Measures; Mechanics; Metabolic; Methods; Morphology; Motor; Movement; Muscle; Muscular Atrophy; Nature; Operating System; Participant; Performance; Phase; Physical therapy; Pilot Projects; Pliability; Positioning Attribute; Protocols documentation; Purpose; Ramp; Randomized; Randomized Controlled Trials; Range of motion exercise; Rate; Research; Resistance; Route; Safety; Skeletal Muscle; Standards of Weights and Measures; Stroke; System; Technology; Testing; Time; Training; Training Programs; Treatment Protocols; Week; Weight; Wellness Center; Work; age related; commercialization; cost; design; falls; frailty; improved; innovation; male; men; motor control; muscle strength; next generation; novel; older women; programs; prototype; response; sarcopenia; strength training

DESCRIPTION (provided by applicant): Introduction: Skeletal muscle atrophy and weakness affect older adults and often lead to frailty, falls, fractures, immobility and institutionalization. At any age this decline can be ameliorated by progressive resistance training (PRT). During traditional PRT with weights, the agonist (target) muscles lift a weight with a shortening contraction (SC) and then lower the same weight with a lengthening contraction (LC). Recent randomized controlled trials suggest that eliminating the SC-phase and applying a larger-than-normal load to the agonist muscles during the LC-phase of the training cycle (LC-only training) can result in greater strength increases at a lower acute metabolic cost and a lower rate of perceived exertion than traditional SC-LC training. LC-only training, however, tends to be more specific to improving LC strength than SC strength. Even larger increases in both SC and LC dynamic strength and muscle morphology are achieved by combining lower-load SC with higher-load LC training which is particularly attractive for older and energetically impaired adults. Despite the advantages and need for such a regimen, no commercial system exists that has the flexibility to enable both lower-load SC and higher-load LC training that is suitable for older adults and accessible to the broader public for independent use. Innovation: Bio Logic Engineering Inc. is addressing this need by developing an innovative computer controlled and motorized system that enables safe and effective strength training with velocity-controlled shortening contraction (VSC) and lengthening contraction (VLC) training protocols. The system provides programmable variable-resistance force target trajectories across the range-of-motion in both VSC and VLC phases of each training repetition. Trainees modulate their level of exertion to follow customized target trajectories that are visually displayed along with real-time force-position feedback. The unique design is ideally suited for older adults since the magnitude (intensity) of the target trajectory for the VLC phase can be programmed to be significantly elevated with respect to the VSC phase. The technology is currently being developed as a leg press machine to improve mobility in older adults but is transferable to training of other muscle groups. Aims of Phase II: System mechanics, electronics and software will be refined to improve safety, ease-of-use, flexibility and dynamic performance. Clinical performance will be assessed with 36 healthy older adults randomized into two different 16-week PRT groups stratified by gender: (GROUP 1) 9 males and 9 females will perform traditional SC-LC training with the weight-stack and (GROUP 2) 9 males and 9 females will perform motor-driven VSC-VLC training. The hypothesis to be tested is: the adaptive response to 16-weeks of PRT will be greater for the VSC-VLC group than the SC-LC group as measured by the maximum voluntary leg extension strength during standard one-repetition maximum SCs, one-repetition maximum VSCs, and isometric contractions. Commercial Opportunity: The potential market for the system is large considering its use in health clubs, wellness centers, physical therapy clinics, assisted-living communities, hospitals, and academic institutions. The objective of this research is to continue to develop, refine and test a novel computer-controlled strength training system to assist in combating sarcopenia which is an age-related progressive loss of skeletal muscle that leads to a decline in muscular strength, power and mobility. The working hypothesis is that 16 weeks of progressive resistance training with the new computer-controlled system, which enables variable-resistance through the range-of-motion and elevated loading during the muscle lengthening phase, will lead older adults to greater increases in strength than with traditional weight training methods. The long-term goal of this research is to make widely available an innovative apparatus and method to improve the efficacy of progressive resistance strength training, especially in older adults.

描述(申请人提供)：简介：骨骼肌萎缩和虚弱影响老年人，经常导致虚弱、摔倒、骨折、僵硬和制度化。在任何年龄段，这种下降都可以通过渐进式阻力训练(PRT)来改善。在传统的负重PRT中，激动者(目标)肌肉通过缩短收缩(SC)举起重量，然后通过延长收缩(LC)降低相同重量。最近的随机对照试验表明，与传统的SC-LC训练相比，取消SC阶段并在训练周期的LC阶段(仅LC训练)对激动肌施加比正常更大的负荷可以在更低的急性代谢成本和感觉到的劳累率下获得更大的力量增加。然而，仅限LC的训练往往比SC力量更有针对性地提高LC力量。通过将低负荷的SC和高负荷的LC训练结合起来，SC和LC的动态力量和肌肉形态都得到了更大的提高，这对老年人和精力受损的成年人特别有吸引力。尽管有这样一种养生法的优点和必要性，但没有一种商业系统能够灵活地实现适合老年人的低负荷SC和高负荷LC训练，并向更广泛的公众提供独立使用。创新：Bio Logic Engineering Inc.正在通过开发一种创新的计算机控制和机动系统来满足这一需求，该系统通过速度控制的缩短收缩(VSC)和延长收缩(VLC)训练方案实现安全有效的力量训练。该系统在每次重复训练的VSC和VLC阶段提供可编程的可变阻力力目标轨迹。受训者调整他们的努力水平，以遵循定制的目标轨迹，这些轨迹与实时的力-位置反馈一起视觉显示。这种独特的设计非常适合老年人，因为VLC阶段的目标轨迹的大小(强度)可以编程为相对于VSC阶段显著提高。这项技术目前正被开发为腿部按压机器，以改善老年人的活动能力，但可以转移到其他肌肉群的训练中。第二阶段的目标：将改进系统机械、电子和软件，以提高安全性、易用性、灵活性和动态性能。将对36名健康老年人的临床表现进行评估，按性别将其随机分成两个不同的16周PRT组：(1)9名男性和9名女性将进行传统的负重SC-LC训练，(2)9名男性和9名女性将进行运动驱动的VSC-VLC训练。要检验的假设是：VSC-VLC组对16周PRT的适应性反应将比SC-LC组更大，这是通过标准的一次重复最大SCs、一次重复最大VSCs和等长收缩时的最大自愿腿部伸展力量来衡量的。商业机会：考虑到它在健身俱乐部、健康中心、理疗诊所、辅助生活社区、医院和学术机构的使用，该系统的潜在市场是巨大的。这项研究的目的是继续开发、改进和测试一种新的计算机控制的力量训练系统，以帮助对抗骨骼肌减少症，这是一种与年龄相关的骨骼肌进行性丧失，导致肌肉力量、力量和灵活性的下降。工作假设是，使用新的计算机控制系统进行16周的渐进式阻力训练，可以在肌肉延长阶段通过运动范围和负荷增加来进行可变阻力训练，这将使老年人的力量增长比传统的举重训练方法更大。这项研究的长期目标是提供一种创新的设备和方法来提高渐进性阻力力量训练的效果，特别是在老年人中。