Heat doesn't usually damage muscles or joints. Instead, it changes how your body works. When it's hot, you lose more fluid through sweating. Even mild dehydration can leave muscles feeling tight and joints less comfortable. Many people also sleep less well during hot weather. Poor sleep can make aches and pains feel worse the next day.

A look at why our balance changes as we age and what we can do about it.

As we get older, many of us accept aches, pains, and a loss of physical strength as just another part of ageing. But what if these changes were not simply inevitable, but rather the result of a largely preventable condition?