Work capacity assessment of Nigerian bricklayers

Abstract

The main aim of this study is to assess the physical work capacity of bricklayers with focus on the energy expenditure during work. Eighty Nine bricklayers’ working on various sites in Ibadan and Eruwa towns of Oyo State, Nigeria are used for the study. Correlation and regression analysis using SPSS 16.0 Statistical Package was used to determine the relationship between VO2 given the age and weight of the subjects; % RHR(Relative Heart Rate) and working heart rate (HRW) given weight; VO2 and %RHR given Body Mass Index (BMI). The results showed that the mean energy expenditure of bricklaying was 1.5l/min of oxygen (7.23Kcal/min, using a conversion factor of 4.82) which classified bricklaying as “heavy work”. A rest allowance of 64.45% (38.67 minutes rest for 60 minutes work duration) was calculated. It was concluded that there is a need to redesign the work content of the aforementioned occupation in order to reduce excessive strain on the workers, which in turn will increase productivity.

Keywords

• Work capacity
• Bricklayers
• Energy expenditure
• Heart rate
• Rest allowance