In the mid-19th century, German chemist Justus von Liebig claimed that high heat forms a watertight crust that locks the juices inside. The idea has since been debunked: the crust is anything but waterproof, and seared meat loses as much moisture as gently cooked meat, sometimes more. Searing is still worth doing, just for a different reason: all that rich, roasted flavor.
Chlorine on its own is fairly gentle. But when it combines with urine, sweat and other grime from swimmers, it forms chloramines, which cause stinging eyes and that classic 'chlorine smell'. A well-kept pool barely smells at all. Shower before you swim and never pee in the water.
Muscle mass slowly shrinks with age, putting independence at risk. But in 1990, a study had nursing home residents aged 86 to 96 train their legs for eight weeks: their strength more than doubled. Muscle responds to training at any age. Getting up from a chair without using your hands is already an exercise.