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Introduction to Exercise Physiology (What happens during exercise?…
Introduction to Exercise Physiology
What is it?
Physiology
Study of how the body and its parts work or function
Exercise Physiology
Study of how the body and its parts work or function during acute and chronic exercise conditions
Why study it?
2 distinct goals
use of exercise to further understand how the body functions
use of that knowledge to develop activities and programs that establish, maintain, and promote physical fitness
What happens during exercise?
Respiratory
increase maximal pulmonary ventilation
increase tidal volume
increase respiratory rate
increase pulmonary diffusion
increase arterial-venous oxygen difference
(a-VO2 diff)
Cardiovascular
increase heart size and thickness
(athlete's heart)
Cardiac Output = Heart Rate x Stroke Volume
Q = HR x SV
Oxygen Uptake = Heart Rate x Stroke Volume x Arterial-Venous Oxygen Difference
VO2 = HR x SV x (a-VO2 diff)
increase number of capillaries in muscle
increase opening of capillaries
Better blood redistribution
Blood
increase blood volume
plasma volume + red cells
Muscle
tiny tears form in the muscles that help them grow bigger and stronger as they heal
