![An investigation of myocardial aerobic capacity as a measure of both physical and cognitive workloads [An article from: International Journal of Industrial Ergonomics]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR4Z20.jpg)
An investigation of myocardial aerobic capacity as a measure of both physical and cognitive workloads [An article from: International Journal of Industrial Ergonomics]
Book Details
PublisherElsevier
ISBN / ASINB000RR4Z20
ISBN-13978B000RR4Z24
AvailabilityAvailable for download now
Sales Rank10,779,190
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from International Journal of Industrial Ergonomics, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
With increased automation and supervisory control, the physical content of jobs has decreased while cognitive workload has increased. The cardiovascular system responds to both physical and cognitive stresses, and their combination, by causing an increase in both heart rate (HR) and blood pressure. The increase in HR and blood pressure cause an increase in myocardial contractility, which results in an increase in myocardial oxygen consumption (MV"O"""2). The rate-pressure product (RPP), given by the product of HR and systolic blood pressure, is a very reliable indirect measure of MV"O"""2. With this in mind, an experiment was conducted on 12 able-bodied male students from the University population. Subjects were required to perform three cognitive tasks (Stroop Incongruent Color-Word Test, simulated public speaking, and calculating task) under two physical conditions (riding a Schwinn Airdyne at a constant speed of 1/3 of their estimated maximum HR, and seated at rest on the Schwinn Airdyne). HR and blood pressure were monitored throughout the testing period. Results of the analysis of the randomized block design indicated that both cognitive and physical tasks had a significant effect on RPP. Additionally, the findings from this study indicated that RPP can be used as an objective measure to separate the components of cognitive workload and cognitive stress in combined tasks. Relevance to industry: Rate-pressure product may be used as a measure of occupational workload, both cognitive and physical. It may be possible to use RPP measures to set limits on workloads and for establishing work allowance.
Description:
With increased automation and supervisory control, the physical content of jobs has decreased while cognitive workload has increased. The cardiovascular system responds to both physical and cognitive stresses, and their combination, by causing an increase in both heart rate (HR) and blood pressure. The increase in HR and blood pressure cause an increase in myocardial contractility, which results in an increase in myocardial oxygen consumption (MV"O"""2). The rate-pressure product (RPP), given by the product of HR and systolic blood pressure, is a very reliable indirect measure of MV"O"""2. With this in mind, an experiment was conducted on 12 able-bodied male students from the University population. Subjects were required to perform three cognitive tasks (Stroop Incongruent Color-Word Test, simulated public speaking, and calculating task) under two physical conditions (riding a Schwinn Airdyne at a constant speed of 1/3 of their estimated maximum HR, and seated at rest on the Schwinn Airdyne). HR and blood pressure were monitored throughout the testing period. Results of the analysis of the randomized block design indicated that both cognitive and physical tasks had a significant effect on RPP. Additionally, the findings from this study indicated that RPP can be used as an objective measure to separate the components of cognitive workload and cognitive stress in combined tasks. Relevance to industry: Rate-pressure product may be used as a measure of occupational workload, both cognitive and physical. It may be possible to use RPP measures to set limits on workloads and for establishing work allowance.
