Authors' reply

摘要

I agree with Pedro Hallal and I-Min Lee (Feb 2, p 356)1 that "prescription of physical activity should be placed on a par with drug prescription". However, this statement implies that doctors know how to prescribe, monitor, and evaluate the effectiveness of the exercise prescribed (eg, adapting exercise type, intensity, frequency, and duration according to individuals' characteristics, such as age and chronic conditions). Scientific reports23 and my experience in a public health programme for the promotion of daily exercise in Brazil suggest that this is not the case.