Abstract
The total metabolic cost of shovelling and tramming consists of three components of energy expenditure, namely, the effort of moving the body only, the effort of moving the empty shovel or empty mine car, and the effort of moving a load on the shovel or in the mine car. The relative proportions of these components of energy expenditure were estimated in a study on sixteen Bantu subjects engaged in various rates of shovelling and in tramming a mine car at a pre-determined speed while the cars contained different loads.
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