Measuring human energy expenditure: public health application to counter inactivity

This article discusses the use of indirect calorimetry for the measurement of human energy expenditure. Quantification of energy expenditure during low efficiency walking (as depicted in the Monty Python sketch The Ministry of Silly Walks) is presented as an example of how physical activity recommendations could be met by exchanging ~11 minutes per day of normal walking with low efficiency walking—without requiring any further time commitment.