相关实验视频

Updated: Jun 24, 2025

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
10:52

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Published on: April 13, 2016

8.8K

在骑自行车时,相对踩踏力较低

David Barranco-Gil1, Alejandro Hernández-Belmonte2, Jon Iriberri3

  • 1Faculty of Sport Sciences, Universidad Europea de Madrid, Spain. Electronic address: https://twitter.com/david_barranco.

Journal of science and medicine in sport
|June 5, 2024
PubMed
概括

骑自行车的人在更高的强度和更低的节奏下经历了更高的机械力需求. 然而,即使在强烈的努力中,这些需求仍然相对较低,这表明通过专门的培训提高扭矩生产能力的潜力.

关键词:
评估评估的方法生物力学 生物力学骑自行车运动 自行车运动业绩表现 业绩表现 业绩表现表现扭矩 扭矩是指扭矩.

更多相关视频

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion08:55

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

Published on: February 5, 2020

7.5K
Paradigms of Lower Extremity Electrical Stimulation Training After Spinal Cord Injury08:07

Paradigms of Lower Extremity Electrical Stimulation Training After Spinal Cord Injury

Published on: February 1, 2018

12.7K

相关概念视频

Moment of a Force About an Axis: Scalar01:28

Moment of a Force About an Axis: Scalar

The moment of a force about an axis is a crucial concept in mechanics that helps determine an object's rotational motion around a specific point or axis. The moment of force can be calculated using scalar analysis, which involves considering the perpendicular distance between the axis of rotation and the line of action of the force or simply the moment arm.
To better understand the concept of moment of force, consider the example of a cyclist riding a bicycle. When the cyclist applies force...
355
Moment of a Force About an Axis: Vector01:29

Moment of a Force About an Axis: Vector

When a force is exerted on an object, it can cause that object to rotate about an axis. The moment of a force, also known as torque, measures the force's ability to cause that rotation. In the case of a cyclist pedaling a bicycle, the force exerted on the pedal causes the crankshaft to rotate, which in turn causes the wheel to spin. The moment of the force exerted on the pedal drives the wheel's rotation.
First, establish a coordinate system to understand how the moment of a force...
381
Pulmonary Cycle: Exhalation01:17

Pulmonary Cycle: Exhalation

In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
1.5K
Rolling Resistance01:21

Rolling Resistance

When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...
286
Static and Kinetic Frictional Force01:05

Static and Kinetic Frictional Force

One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
15.8K
Energy Diagrams - II01:10

Energy Diagrams - II

Energy diagrams are important to understand the dynamics of a system. The topology of an energy diagram helps illustrate the equilibrium points of the system.
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The...
4.6K