What is evidence-based?
Evidence-based exercise is derived from the scientific literature. The evidence is categorised based on the study designs and these are appropriately graded to give the exercise or medical professional an understanding as to how sure they can recommend an exercise intervention for a given health condition. For example, the strongest evidence for therapeutic interventions is provided by systematic reviews which aims to evaluate all high quality studies published in peer-reviewed scientific journals on a given intervention. In contrast, patient testimonials, case reports, and even expert opinion have little value because these observations do not take into account inherent biases of the observations and does not account for potential placebo effects.
Sourced from Australian Bureau of Statistics: http://www.abs.gov.au/ausstats/abs@.nsf/Lookup/3303.0Chapter42011