An interesting study from YouGov, which was commissioned by Swim England

According to a new study from YouGov, commissioned by Swim England, swimming significantly reduces the symptoms of anxiety and depression for 1.4 million adults in Britain. Almost half a million of these adults (492,000) say swimming has resulted in fewer visits to a medical professional regarding their mental health. It was also revealed 490,000 people have either stopped or reduced medication for their mental health condition because of swimming.