快速步行速度对中风后和非四肢肌肉同活化的差异影响
Natalia Sánchez1,2, Andrian Kuch1, Samantha N Jeffcoat1
1Department of Physical Therapy. Chapman University, Irvine, CA, USA.
Neurorehabilitation and neural repair
|December 4, 2025
概括
在中风后进行高强度训练可能会从调整的步行速度中受益. 我们的研究表明,用于减少神经肌肉协作激活的最佳步行速度与自我选择的速度不同,特别是对于肢.
科学领域:
- 神经学 神经学
- 生物力学 生物力学
- 康复科学 康复科学 康复科学
背景情况:
- 对于中风恢复的临床指南强调高强度有氧训练,通常涉及快速行走速度.
- 不同步行速度对中风后行走神经肌肉控制的急性影响尚不清楚.
研究的目的:
- 验证动态运动控制指数 (WalkDMC) 用于测量中风幸存者的联合激活.
- 研究中风后的取决于速度的联合激活模式.
- 检查临床因素如何影响不同速度的联合激活反应.
- 确定心率和中风后的同活化之间的关系.
主要方法:
- 32名慢性中风幸存者和17名对照人以自我选择的快速和慢速步行.
- 两侧记录了7个下肢肌肉的电肌图 (EMG).
- 非负矩阵分解计算了WalkDMC;回归分析了WalkDMC,速度,心率和临床结果之间的关系.
主要成果:
- WalkDMC证明了标准的有效性,与临床结果相关.
- 观察到速度和协作激活之间的二次关系; 降低协作激活的最佳速度比自选速度高120%.
- 缓慢的步行速度增加了对照组和中风幸存者的联合激活.
- 通过步行速度,平衡和损伤,帕雷斯肢体的联合激活显著预测.
结论:
- 增加的步行速度差异性地改善了中风后性和非性四肢的协作激活.
- 这些发现可以指导高强度训练 (HIT) 干预措施的速度处方,以优化行走恢复.
相关概念视频
Classification of Skeletal Muscle Fibers
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
Muscle Stimulation Frequency
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Types of Skeletal Muscle Fibers
Skeletal muscles comprise various fibers, each with distinct characteristics and roles in movement and stability. They are mainly categorized into three types — fast-twitch, slow-twitch, and intermediate.
Fast-twitch fibers
Fast-twitch fibers, or Type II fibers, are designed for quick, powerful bursts of speed and strength. They reach peak tension within approximately 0.01 seconds following stimulation. Characterized by a large diameter and densely packed myofibrils, these fibers contain...
Fast-twitch fibers
Fast-twitch fibers, or Type II fibers, are designed for quick, powerful bursts of speed and strength. They reach peak tension within approximately 0.01 seconds following stimulation. Characterized by a large diameter and densely packed myofibrils, these fibers contain...
Exercise and Muscle Performance
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Exercise and Cardiac Output
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...
Sustained exercise increases the muscles' oxygen demand, which can be met...
Exercise and Cardiovascular Response
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...


