My mother is forty-two, and she works in an office all day.
Last year the doctor said her was not strong.
He did not give her medicine; he gave her simple : walk thirty minutes every day.
At first my mother walked in the evening, however she was often too tired after work.
So now she leaves the bus one stop before her office and walks from there.
In the afternoon she also uses the of the .
After six months, the doctor was glad with the .
My mother says she sleeps better and she is not so worried.
Thirty minutes is not much, but it changed her year.