In the European Union, any new item bought from a business comes with at least two years of legal guarantee of conformity. In France, any fault appearing during those two years is presumed to have existed at purchase: it's up to the seller to prove otherwise, not you. They must repair or replace it free of charge. Before paying for an extended warranty at the till, check it doesn't mostly cover what the law already gives you.
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.