老年人使用Zio XT车载加速度计进行体力活动的切割点
Lacey H Etzkorn1,2, Anis Davoudi1, Erin E Dooley3
1Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
BMC digital health
|August 1, 2025
概括
齐奥XT监控器的新切割点有助于估计体育活动强度. 齐奥加速仪提供可靠的活动估计,与腰部佩戴设备相美,有助于老年人临床研究.
科学领域:
- 生物医学工程 生物医学工程
- 测量身体活动的测量方法
- 老年学是指老年学的学科.
背景情况:
- 齐奥XT监视器是一款心电图装置,包括用于量化身体活动的加速度计.
- 准确的体力活动评估对于理解自由生活环境中的健康至关重要,尤其是在老年人中.
研究的目的:
- 为Zio加速计建立活动截止点,以估计在非常轻,轻和中度至强烈的体力活动 (VLIPA,LIPA,MVPA) 中花费的时间.
- 为了比较Zio的24小时佩戴协议估计的每日MVPA与腰部佩戴加速度计的清醒佩戴协议.
主要方法:
- 来自ARIC研究的参与者 (n=381) 同时佩戴Zio和腰部佩戴的ActiGraph GT3X设备.
- 身体活动的总结是使用Zio的平均幅度偏差 (MAD) 和GT3X的矢量大小计数 (VMC).
- GT3X VMC切割点被映射到Zio MAD,使用量子-量子方法.
主要成果:
- 对VLIPA,LIPA和MVPA进行映射的Zio MAD切割点分别为9.04,28.2和58.1毫克.
- 当佩戴时间重叠时,Zio和GT3X对日常活动强度显示出强烈的相关性 (ICC>0.7).
- MVPA估计显示,使用各自的磨损时间的设备之间存在很高的一致性 (ICC = 0.77);Zio报告了更多的LIPA和VLIPA.
结论:
- 在涉及老年人的临床研究中,Zio加速计的建议切断点.
- 齐奥加速度计提供可靠的体力活动强度数据,与传统的腰部佩戴设备相比.
相关概念视频
Average Acceleration
The importance of understanding acceleration spans our day-to-day experiences, as well as the vast reaches of outer space and the tiny world of subatomic physics. In everyday conversation, to accelerate means to speed up. For instance, we are familiar with the acceleration of our car; the harder we apply our foot to the gas pedal, the faster we accelerate. The greater the acceleration, the greater the change in velocity over a given time. Acceleration is widely seen in experimental physics. In...
Power Expended by a Constant Force
The relationship between work done and the time taken to do it can be explained using the concept of power. For example, several sprinters in a race may have the same velocity when they reach the finish line, therefore doing the same amount of work, but the winner does it in the least amount of time. Thus, power is defined as the rate of doing work. Since work can vary as a function of time, the average power is defined as the work done during a time interval, divided by the time interval.
Equipments Used To Measure Blood Pressure
Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Mechanical Efficiency of Real Machines
The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...
However, in reality, no machine can be truly ideal, and all of them experience some...
Motor Unit Stimulation
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...
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...


