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The relationship between heart rate as an indicator of work hardness and results of dynamometry

Issue title: IEA 2012: 18th World congress on Ergonomics - Designing a sustainable future

Article type: Research Article

Authors: Sadeghi, Nasrin | Tolide-ie, Hamidreza | Ghaderi, Fatemeh

Affiliations: Instructor, Department of Occupational hygiene, Gonabad University of Medical Sciences, Gonabad, IRAN | Instructor, Department of Public health, Gonabad University of Medical Sciences, Gonabad, IRAN | Occupational hygiene student, Health faculty, Shiraz University of Medical Sciences, IRAN

Note: [] Corresponding author. E-mail: [email protected]

Keywords: Dynamometry, Grip force, Pinch force, back-leg-chest force, Heart rate, Work hardness

DOI: 10.3233/WOR-2012-0917-5677

Journal: Work, vol. 41, no. Supplement 1, pp. 5677-5680, 2012

Published: 2012
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Abstract

Heart rate is associated with work hardness and increase linearly with its increasing. In the average of energy consumption, heart rate measurement is simple but non-accurate method for calculation of work hardness. Our purpose in this research was to evaluate the relationship between heart rate and dynamometry results with hypothesis of work hardness effectiveness on the human power. This study was conducted on 102 porcelain workers. Participants were selected randomly. The research tools include stethoscope, the dynamometer. Heart rate, and pinch, grip, and back-leg-chest force were measured and relationships between variables were analyzed with Pearson correlation test and independent T-test using Spss16 software. The average heart rate of participants were 4.11±1.79 with minimum 60 and maximum120. The average force of pinch, grip, and back-leg-chest were 8.9±3.20, 4.2±4.5 and 9.36±6.55, respectively. Work hardness for 3.86% of workers were light, 7.12% were moderate and 1% were heavy. Pinch, grip, and back-leg-chest force relation with heart rate were not significant (r=0.01, p=0.85), (r=-0.03, p=0.74), and (r=0.05, p= 0.59), respectively. There was no correlation between heart rate and work hardness. So we can’t use the dynamometry results to determine of work hardness.

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