Heart rate and Upper Limb exercises

[moomoovi]

hi
i was wondering if there is a relation with small muscles group and big muscles group influence on heart rate. Why is that small muscles group will cause a higher rise in BP compared to that of a large muscle group??
thanks

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[edsonlizarazo]

Exercises have a blood flow redistribution component. Arterial dilation is seen in places being exercised and constriction in places where no activity is carried on.
In UE exercises, blood is re-directed to this area and the amount decreases in LE. Therefore smallest blood vessels are containing a bigger amount of blood.
The heart has to increase its contraction strength to deliver blood to UE. This is known as the afterload of the left heart (ventricle). this mechanism increases of course the diastolic BP. In LE activities the Diastolic BP tends to decrease due to the same effect in bigger blood vessels.
UE activities are contraindicated in patients with Hypertension and after certain heart conditions.
When you prescribe UE exercises, the formula has to decrease the HR by 10 bpm.
Instead of 220 - age for males, it has to be 210- age. and 200- age for females.
Remember that these patients usually have med prescriptions that interfere with HR (digitalis, B-Blockers etc..) A Borg scale of perceived exertion could be more accurate in monitoring their exercise response.