Photo by i yunmai on Unsplash It looks like we have to rethink what a healthy BMI is! This study below shows that above a BMI of 23 kg/m2 there is a linear increase in risk of severe COVID-19 leading to admission to hospital and death, and a linear increase in admission to an ICU across the whole BMI range, which is not attributable to excess risks of related diseases. The important thing to point out is that the relative risk due to increasing BMI is particularly notable in people younger than 40 years and of black ethnicity . This means that if your BMI (weight/height (m)-squared) is above 23 you should probably do something about it. In parallel to this, I read an article a few weeks ago that said you need to get back to what you weighed when you were aged 21. If I did this I would need to lose 13kg (2 stones) and my BMI would be 22. So I am going to get on the case and will be joining the #BackTo21 challenge and in so doing maximising my chances of doing okay if I ever get...