Re your article (Wim Hof breathing and cold-exposure method may have benefits, study finds, 13 March), my secondary school PE teacher once made our class run barefoot around the snow-covered playing field. As I recall, we did not feel better from doing this.
Polly Bird
Bedlington, Northumberland
• The headline of your editorial on low-traffic neighbourhoods (11 March) invites us to “spread the word – these schemes work”. But it might be time to rebrand them. It would be easier to sell a “health improvement zone” or a “reduced child asthma neighbourhood” than a Ulez or an LTN – and harder to oppose it.
Harriet Ward
Emeritus professor, Department of Criminology, Sociology and Social Policy, Loughborough University
