Special Feature

We all hold the secret to getting fit, according to researchers from the University of Exeter. The research team has shown that we each have a built-in ability to judge how hard our bodies are working, often with remarkable precision.

A series of studies over the last two years, culminating in three academic papers in the past two months, has shown a consistently close correlation between actual and perceived exertion in people of all levels of fitness. The team has found that an individual's own sense of how hard he or she is working corresponds exactly with actual level of exertion, measured by heart-rate and oxygen uptake.

The experiments involved people being asked to exercise at various levels of intensity on a scale of six to 20, with six being completely inactive and 20 being on the verge of exhaustion. The amount of exertion was determined purely by the individual, who made a judgement on how hard to work based on his or her interpretation of the scale. The researchers simultaneously monitored the person's heart-rate and oxygen uptake, which are the most widely-used measures of physical exertion. In almost all cases the results matched exactly the levels that would be predicted for each specific number on the six to 20 scale. This demonstrates our ability to judge precisely how hard our bodies are working.

Professor Roger Eston, Head of the University of Exeter's School of Sport and Health Sciences says: "We have worked with over 300 individuals in the last two years and now have a body of evidence to show that we each have a highly accurate built-in exercise monitor.

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