It was a never a truth to begin with, really. Even the original study was rather controversial in its results. Fat but 'fit' is a transitory state between healthy weight and fit or obesity and unfit; eventually all that weight will catch up with you.
The WP author here confuses correlation with causation.
Both obesity and fitness response to cardio (e.g. measured by VO2Max) have genetic factors (many obese people are genetically low-responders to cardio). See the recent University of Bath study for details.
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[ 2.3 ms ] story [ 18.8 ms ] threadBoth obesity and fitness response to cardio (e.g. measured by VO2Max) have genetic factors (many obese people are genetically low-responders to cardio). See the recent University of Bath study for details.