电路强度训练中的急性神经肌肉疲劳:不同工作到休息时间的影响
Aaron Agudo-Ortega1,2, Sara Echeberria-Castaño1, Javier Iglesias García1
1AExPH, Facultad de Ciencias Biomédicas y de la Salud, Universidad Alfonso X el Sabio (UAX), Avenida de la Universidad, Madrid, España.
Frontiers in sports and active living
|February 19, 2026
概括
使用较长的休息间隔 (30秒) 的循环训练 (CT) 允许比较短的间隔 (10秒,20秒) 更大的重复量. 这项研究调查了不同工作休息比对抵抗运动期间神经肌肉疲劳的影响.
科学领域:
- 运动生理学 运动生理学
- 运动科学 运动科学 运动科学
- 神经肌肉适应的过程
背景情况:
- 电路训练 (CT) 是一种流行的抵抗运动方法,用于改善身体健康.
- 在CT中最大限度地减少神经肌肉疲劳的最佳工作休息间隔尚未得到充分理解.
- 了解这些参数对于设计有效的培训计划至关重要.
研究的目的:
- 为了研究不同1:1的工作休息间隔时间 (10s,20s,30s) 在循环训练中对神经肌肉疲劳的急性影响.
- 为了比较这些不同间隔对运动表现和重复量的影响.
主要方法:
- 34名身体活跃的参与者完成了14分钟的电路训练方案,工作与休息比例为1:1,分别为10,20和30秒.
- 平均推进速度 (MPV) 被测量为腰和长椅压力练习的训练前和训练后.
- 对于每个练习,记录了所执行的重复总数.
主要成果:
- 在所有方案中观察到MPV的显著减少,这表明急性神经肌肉疲劳.
- 与10:10和20:20协议相比,30:30协议导致更高的重复率和更大的整体重复量.
- 不同的间隔持续时间之间没有发现疲劳程度的显著差异.
结论:
- 循环训练会诱导急性神经肌肉疲劳,而不管工作休息间隔的时间是1:1的.
- 在CT中较长的休息间隔 (30秒) 可以提高重复量和性能,而不会增加疲劳程度.
- 训练处方应考虑工作休息间隔,以优化炼量和适应性.
相关概念视频
01:24Muscle Recovery and Fatigue
4.4K
Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
4.4K
01:22Muscle Stimulation Frequency
4.8K
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...
4.8K
01:20Motor Unit Stimulation
4.0K
When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
4.0K
01:25Energy Supply for Muscle Contraction
5.9K
Skeletal muscle fibers have the unique ability to switch between rest and contraction states, using different sources of ATP for energy. The contraction cycle and Ca2+ transport back into the sarcoplasmic reticulum for relaxation require significant ATP. However, the ATP reserves in muscle fibers are limited and can only sustain contractions for a few seconds. Additional ATP production becomes necessary for prolonged contractions. As a result, muscle fibers generate ATP through various sources,...
5.9K
01:27Exercise and Muscle Performance
2.7K
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...
2.7K
01:29Relaxation of Skeletal Muscles
6.2K
The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
6.2K