<![CDATA[Truck tire mounting is a manual, physically demanding activity that can impose a physiological load on workers. Previous research has led to the development of a truck tire mounting tool based on an ergo-mechanical approach that accounts for workers' anthropometric characteristics. This study aims to evaluate the performance of a newly developed tool by comparing a conventional method with the method using the new tool, based on installation time and workers' physiological responses. Testing was conducted on five male workers, comparing installation time, heart rate change (ΔHR), and Cardiovascular Load (%CVL) between the two methods. The magnitude of the difference between the two conditions was also evaluated using Cohen's dz effect size for paired data. The results show that the mean setup time decreased from 4.08 to 2.92 minutes, a reduction of 28.48%. The mean ΔHR decreased from 31.8 to 15.8 bpm (a 50.3% reduction), while the mean %CVL decreased from 26.34% to 13.06% (a 50.42% reduction). Effect size analysis reveals consistent differences between the two methods regarding installation time, ΔHR, and %CVL. The study results indicate that using the new tool could improve the efficiency of the tire installation process while reducing workers' cardiovascular response. However, the limited number of subjects means that the results of this study need to be viewed as initial experimental evidence and cannot be generalised to a wider working population.]]>
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