Sleeping in by hours on Saturday creates 'social jet lag': your body clock changes time zones without you going anywhere. By Monday, falling asleep gets harder and waking up feels brutal. Keeping a steady wake-up time, within an hour or so, stabilizes the whole cycle. Your alarm time matters more than your bedtime.
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.