Dempsey-Liberty Mutual Lift Energy Expenditure Calculator

Population          
Body weight kg
Box size
Box weight kg
Frequency /min

Lift low:
VO2 (ml/min)

Kcal/min

Kcal/day

Lift low acceptable?


Lift centre:
VO2 (ml/min)

Kcal/min

Kcal/day

Lift centre acceptable?

Metabolic equations were developed by Liberty Mutual to predict oxygen consumption for individual and combination materials handling tasks. The calculated expenditure limit is expressed as the rate of oxygen consumption per minute (VO2).

The calculator on this website converts the VO2 value to kcal per minute. According to Mital et al. (1993), the threshold limit for a male population is 4 kcal per minute and for a female population 3 kcal per minute.

Lift low vertical range:
  •  14 cm to 76 cm (females)
  •  14 cm to 81 cm (males)

Lift centre vertical range:
  •  76 cm to 137 cm (females)
  •  81 cm to 145 cm (males)

Source:
Oxygen Consumption Prediction Models for Individual and Combination Materials Handling Tasks, published by Dempsey, et al., 2008.

A Guide to Manual Materials Handling, published by Mital, et al., 1993.