Table 2 shows that in Task Group A, there is no consistent maximum percentage blood pressure
change for the four test subjects. The maximum blood pressure change was 15.4% for a test subject
while performing delivering and serving afternoon tea trolley. Two out of four participants displayed the
highest maximum blood pressure change while collecting trays and trolleys. For Task Group B, the
data consistently shows that all four subjects displayed higher maximum percentage blood pressure
change in the dishwashing task than the delivering lunch trolleys task. Across six manual tasks, the
test subjects displayed the average highest blood pressure changes of 12.53% while dishwashing and
11.50% while collecting trays and trolleys. Delivering lunch trolleys displayed the lowest average blood
pressure change of only 1.65%.
Of the findings in this study, the individual test subjects’ mean blood pressure percentage changes
ranged from 2.3% to 13.6%. Test subject B displayed the highest mean blood pressure change for
both Task Group A and B whereas test subject D displayed the lowest mean blood pressure change
for both tasks. This shows the physiological responses may varies on individual basis and it may
correlated to individual physical condition, age and sex.