Sitting for hours on end slows how your muscles use glucose. The American Diabetes Association recommends breaking up sitting every 30 minutes with a few minutes of light movement: walking, stretching, climbing a flight of stairs. These breaks improve blood sugar, even in people who already exercise. Take calls standing up and refill your water bottle more often.
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.