Even though they no longer commute to work every day and are resting at home, they just lie down all day saying they are tired.

At first, I thought the fatigue accumulated from working was finally easing, but even though quite some time has passed since their retirement, they continue to be lethargic and lacking energy.

I am confused whether their physical strength has simply declined due to their age, or if there is something wrong with their body.

What should I do when elderly people like this remain lethargic and tired without a clear reason?

They do have some blood pressure due to their age, but it is not serious.