简短的高速运动技能训练增加了步骤频率,并改善了慢步行者慢慢运动不完整脊髓损伤的长度/频率协调
Nicholas H Evans1, Edelle C Field-Fote2
1Shepherd Center, Crawford Research Institute, Atlanta, GA.
Archives of physical medicine and rehabilitation
|March 4, 2024
概括
运动技能训练改善了脊髓损伤患者的步行速度. 对于较慢的步行者来说,这种改善与步骤频率的变化和减少的步行比率有关.
科学领域:
- 神经科学是一个神经科学.
- 康复医学 康复医学 康复医学
- 生物力学 生物力学
背景情况:
- 时空协调对于地面行走至关重要.
- 运动不完整脊髓损伤 (PwMISCI) 的人经常表现出改变的步态参数.
- 步行比 (WR) 是衡量步骤长度 (SL) /步骤频率 (SF) 协调的指标,可以揭示步伐缺陷.
研究的目的:
- 在PwMISCI中使用WR在地面行走期间量化时空协调.
- 研究运动技能训练 (MST) 对SL,SF和步行速度 (WS) 变化之间的关系的影响.
主要方法:
- 日间数据的探索性分析.
- 参与者: 26名普华永道.
- 干预:为期3天的高速MST.
- 结果测量:在10米步行测试期间的地面WS,SL,SF和WR.
主要成果:
- 在全样本中,MST增加了WS,SL和SF,同时减少了WR.
- 慢步行者与快步行者相比,WS和SF的相对增加更大.
- 步行速度的变化有所不同:慢步行者 - 10%;快步行者 - 0%.
- 在慢步行者中,增加的SF解释了WR变化;在快步行者中,增加的SL解释了更多的WR变化.
结论:
- PwMISCI通常比其他神经群体的WR更高,但快步行者的WR与未受伤的成年人相似.
- 慢步行者表现出更高的WR,这与较慢的WS相关.
- 在慢步行者中,MST增强了WS,主要是通过影响SF和减少WR,这表明了改善流动性的关键机制.
相关概念视频
01:22Muscle 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...
01:27Exercise 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...
01:17Exercise 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...
01:20Exercise 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...