Salty “Doctor, my memory is failing and I cann

Salty “Doctor, my memory is failing and I cannot remember the cards when I play Bridge.”
Doctor “If you want to improve your memory and your concentration, you need to get some exercise. A healthy body leads to a healthy mind. Run 10 kilometers a day.”
Two weeks later, Salty calls the doctor.
Doctor "Have you done what I told you?”
Salty “Yes doc, I’ve followed your instruction exactly.”
Doctor “So has your memory and concentration improved since 2 week ago?"
Salty “I don't know, I'm 140 kilometers away from my Bridge Club"