Related Experiment Video
Updated: May 27, 2026
08:12
Experimental Methods to Study Human Postural Control
Published on: September 11, 2019
The relationship between parameters of static and dynamic stability tests.
Mohammad Taghi Karimi1, Stephan Solomonidis
1Assistant Professor, School of Rehabilitation, Isfahan University of Medical sciences, Isfahan, Iran.
Summary
Static balance tests do not predict dynamic balance ability in healthy individuals. This study found no significant correlation between quiet standing stability and performance during functional hand tasks, indicating separate assessment is necessary.
Area of Science:
- Biomechanics
- Human Movement Science
- Kinesiology
Background:
- Stability is categorized as static (e.g., quiet standing) and dynamic (maintaining posture during movement).
- Previous research often relied solely on static balance tests for evaluating stability.
- The predictive relationship between static and dynamic balance remains unclear.
Purpose of the Study:
- To investigate the relationship between static and dynamic stability parameters.
- To determine if static balance can predict dynamic balance in healthy subjects.
Main Methods:
- Twenty-five healthy subjects participated in a clinical trial.
- Subjects performed static stance (quiet standing) and dynamic tasks (reaching with hands).
- Stability was measured using a force plate, and Pearson correlation analyzed the data.
Main Results:
- No significant correlation was found between static and dynamic stability parameters.
- Pearson correlation coefficients for all tested parameters were below 0.46.
Conclusions:
- Static balance ability does not predict dynamic balance performance during functional tasks.
- Evaluating dynamic balance requires specific functional assessments beyond static measures.
Related Concept Videos
01:14Stability of structures
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
01:28Stability
The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
01:26Constraints and Statical Determinacy
In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
01:07Static Equilibrium - II
Static equilibrium is a special case in mechanics that is very important in everyday life. It occurs when the net force and the net torque on an object or system are both zero. This means that both the linear and angular accelerations are zero. Thus, the object is at rest, or its center of mass is moving at a constant velocity. However, this does not mean that no forces are acting on the object within the system. In fact, there are very few scenarios on Earth in which no forces are acting upon...
01:05Static Equilibrium - I
A rigid body is said to be in dynamic equilibrium when both its linear and angular acceleration are zero, relative to an inertial frame of reference. This means that a body in equilibrium can be moving, but only when its linear and angular velocities are constant. A rigid body is said to be in static equilibrium when it is at rest in the selected frame of reference. The distinction between static equilibrium (e.g., a state of rest) and dynamic equilibrium (e.g, a state of uniform motion) is...
01:23Stability of Equilibrium Configuration
Understanding the stability of equilibrium configurations is a fundamental part of mechanical engineering. In any system, there are three distinct types of equilibrium: stable, neutral, and unstable.
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...