A night is made of four to six cycles of about 90 minutes, moving from light sleep to deep sleep to REM. Brief awakenings between cycles are common, and most are forgotten by morning. That isn't insomnia. Skip checking the clock: counting the hours left only keeps you awake.
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.