Goals and methods of production monitoring
The main goal of physiological monitoring in the workplace is an accurate analysis of how body functions change in relation to intermediate and final results of labor.
As a classic example, consider a study at an electronics manufacturing plant during assembly and welding operations. For a comprehensive assessment of workers' condition, synchronous recording of several key parameters is used simultaneously:
- HR (heart rate) and ECG dynamics;
- Respiratory rate;
- General motor activity;
- Galvanic skin responses (GSR);
- Local electromyogram (EMG), for example, of the second and third fingers of both hands during fine motor tasks.
Structure of the production systemquant
For the convenience of physiological analysis, continuous labor activity is broken down into standardized, constantly repeating cycles called systemquants. Each such cycle is tied to a specific stage of work and ends with a defined result.
Let us examine the stage and final results of a single systemquant using assembly and welding operations as an example:
- Grabbing the cylinder with the left hand.
- Fitting the cylinder onto the working rod.
- Taking a metal plate or angle piece with the right hand.
- Precise placement of the plate over the cylinder.
- Direct welding of elements at several points.
- Removing the finished cylinder from the rod.
- Discarding the assembled part.
Physiologists and labor standards specialists evaluate each systemquant by its execution time interval, and also compare the dynamics of respiration and cardiac activity with each specific micro-operation within the cycle.
Worker adaptation and qualification
Studies show a direct relationship between a worker's professional qualification level and the autonomic support of their activity. Somatovegative parameters significantly differ between novices and experienced masters.
Based on the type of physiological response to labor load, two main groups of workers are distinguished:
1. Adapted group Characterized by high coordination of processes. Such employees show correlated changes in breathing and heart rhythms. The main sign of adaptation is high cross-correlation between autonomic parameters and work results (i.e., the internal physiological rhythm strictly corresponds to the external rhythm of production systemquants).
2. Maladapted group This group exhibits pronounced asynchrony. Respiration and cardiac rhythms are uncoordinated. The body fails to adjust autonomic support to the rhythm of production cycles.
Consequences of physiological maladaptation
The lack of synchronization between autonomic functions and the labor process does not go unnoticed. Workers from the maladapted group (even if they show a sincere interest in their profession) exhibit a number of negative clinical and physiological consequences.
The main manifestations of maladaptation include:
- Chronic emotional stress in the workplace;
- Development of rapid and profound fatigue;
- Statistically higher morbidity compared to adapted colleagues;
- Frequent dismissals from production due to the body's inability to withstand the set rhythm.
Briefly: answers to topical questions
What is the physiological significance of the galvanic skin response (GSR) during labor activity?
The galvanic skin response (GSR) during labor acts as an objective indicator of emotional stress and sympathetic nervous system activity. It is used to assess the state of the autonomic nervous system during work, alongside heart rate, respiratory rate, and body temperature.
What methods are used to assess labor severity and intensity?
To objectively assess the physiological cost of work and bodily strain during labor, autonomic parameters are recorded and the execution of production systemquants is evaluated.
Main recorded parameters and methods:
- Heart rate, respiratory rate, GSR, body temperature, and other available physiological indicators.
- Time interval for executing each systemquant.
- Electromyography (EMG) of the second and third fingers of both hands.
- Dynamics of ECG and respiration in relation to each operation.
The goal is to assess the state of the autonomic nervous system during labor and analyze physiological indicators in relation to intermediate and final work results.
What phases of work capacity change are distinguished during a work shift?
Four phases of work capacity change are distinguished during a work shift:
- Warm-up — adaptation to the load.
- Relatively stable work capacity — plateau phase.
- Decrease in work capacity — development of fatigue.
- Secondary increase in work capacity — "end spurt" associated with the anticipation of work completion.
After the lunch break, the work capacity dynamics cycle repeats, but the first phase proceeds faster, the stable work capacity phase is lower in level and shorter in duration, and the decrease in work capacity sets in earlier and faster.
Class and exam questions
What is the main principle of registering physiological functions during labor?
The registration process must under no circumstances interfere with workers performing their socially conditioned labor activity.
What is a production system quantum?
This is a separate repeating cycle of labor activity (e.g., the assembly algorithm for a single part) that has clear intermediate and final results.
How does maladaptation to work manifest physiologically?
It manifests as asynchrony of autonomic parameters: the heart and respiratory rhythms do not match the rhythm of production operations.
What else to study on this topic
- Mechanisms of galvanic skin response formation under labor load
- Fine motor electromyography: analysis of muscle contraction patterns
- Methods for calculating cross-correlation between autonomic and production rhythms
- Physiological basis of rapid fatigue during asynchronous activity
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