Jus to check this out......
The Organs of your body have their sensory touches at the bottom
of your foot, if you massage these points you will find relief from
aches and pains as you can see the heart is on the left foot.
Typically they are shown as points and arrows to show which
organ it connects to.
It is indeed correct since the nerves connected to these organs
This is covered in great details in Acupressure studies or
God created our body so well that he thought of even this. He
made us walk so that we will always be pressing these pressure points
and thus keeping these organs activated at all times.
So, keep walking...