HYPERTENSION and EXERCISE
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چکیده
B l o o d p r e s s u r e i s t h e f o r c e o f t h e b l o o d p u s h i n g a g a i n s t t h e w a l l s o f t h e a r t e r i e s . T h e h e a r t b e a t s a b o u t 6 0 7 5 t i m e s e a c h m i n u t e , a n d t h e b l o o d p r e s s u r e i s a t i t s g r e a t e s t w h e n t h e h e a r t c o n t r a c t s , p u m p i n g b l o o d i n t o t h e a r t e r i e s . T h i s i s c a l l e d s y s t o l i c b l o o d p r e s s u r e . W h e n t h e h e a r t i s r e s t i n g b r i e f l y b e t w e e n b e a t s , t h e b l o o d p r e s s u r e f a l l s , t e r m e d d i a s t o l i c b l o o d p r e s s u r e . T h e r a t i o n a l e f o r t h e p r o p o s i t i o n t h a t p h y s i c a l a c t i v i t y ( o r f i t n e s s ) w i l l h e l p p r e v e n t h y p e r t e n s i o n i s b a s e d o n t h e c a r d i o v a s c u l a r r e s p o n s e s t o e x e r c i s e a n d t h e a d a p t a t i o n s o f t h i s s y s t e m t o t r a i n i n g . T o u n d e r s t a n d t h e s e i t i s i m p o r t a n t t o r e m e m b e r t w o t h i n g s : F i r s t , t h e m o s t f u n d a m e n t a l e q u a t i o n i n v a s c u l a r p h y s i o l o g y :
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