New research shows the meditative exercise improves mental health, reduces stress and can prevent reoffending. The power of yoga to change [a prisoner's] life is backed by two Swedish studies that found it may reduce reoffending. The new study, led by Professor Nra Kerekes at University West, Trollhtten, in Sweden, and published last week in Frontiers in Psychiatry, found that 10 weeks of regular yoga can lead to a significant reduction in obsessive-compulsive and paranoid thinking, which in turn, say researchers, can make reoffending less likely. This effect is specific to yoga, and not to exercise in general, they found. It can also lead to a decrease in somaticisation (mental distress leading to physical symptoms such as breathing problems, heart pains and stomach upsets). The study of 152 volunteers in nine medium- and high-security prisons in Sweden builds on a 2017 study of the same volunteers that showed that yoga improved stress levels, concentration, sleep quality, psychological and emotional wellbeing, as well as reducing aggression and antisocial behaviour. A Prison Service spokeswoman says: Research shows activities like this can make prisoners less likely to reoffend, keeping the public safer. She was unable to explain why, given this evidence, it wasnt government policy to make yoga available to all prisoners, but said it was up to individual prison governors to decide which activities to offer.