Palpitation is an awareness of the abnormal beating of the heart. It may occur in people with or without heart problems. Heart palpitations when lying down is not a common occurrence and can be caused by various factors.
Flat feet occur when the normal foot arches have partially or completely collapsed. When the foot is put to the ground the inner or middle side of the foot comes down to the floor rather than remaining raised. This can cause the whole foot to roll inwards (this is called over-pronation).
Overall, normally occurring flat feet in adults do not cause many functional problems, and many great athletes have done ... An overly high arch (cavus foot) can cause problems ... with the highest arches have the greatest tendency to lower limb injuries, while flat-footed recruits have ...