Those squiggly exercise curves? Let’s talk. 👀🚶‍♂️🚴‍♀️🏋️‍♀️ bmjmedicine.bmj.com/content/5/1/e001513 Physical activity types, variety, and mortality: results from two prospective cohort studies A large new study examined the types of physical activity, variety, and mortality over decades of follow-up. The headlines are mostly solid… but some of the graphs deserve a raised eyebrow. The clear wins • Being physically active is linked to lower mortality across most activities • Doing more than one type of activity adds benefit. Variety matters • Walking shows the most consistent and robust relationship with lower mortality • Resistance exercise is associated with lower mortality, too, with benefits appearing at relatively modest weekly doses Where caution is needed Some dose–response curves look strange. Cycling is a good example. The curve can look “W-shaped”. A little helps, a bit more harms, and then a lot helps again. Does that make biological sense? Unlikely. When most...