For a ladder leaning against a wall, the UK's Health and Safety Executive recommends an angle of about 75°: one unit out from the wall for every four units up. Steeper, it can tip backwards; shallower, its foot can slide out. Other rules: keep three points of contact, don't lean beyond the stiles and don't stand on the top three rungs. Thirty seconds of setup beats a fall.
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.