Card Set Information
What is exercise?
any movement or activity
What is training?
a long-term process of repeated bouts of exercise that improves fitness
What is an exercise response?
a short- term adaptation that increases heart rate and temperature
What is a training response?
a long-term adaptation that increases the number of capillaries around muscle fibers
What are the four purposes of a training program?
increase exercise capacity
increase time to onset of fatigue
improve overall performance
decrease risk of injury
What systems are involved in exercise?
What occurs in the body systems when a horse performs exercise?
transferred to blood
transferred to muscles
expelled as CO2
What is the cellular energy source?
Why do muscles need ATP?
for contraction and relaxation (fuel the muscle)
Can ATP be stored?
How can metabolism regenerate ATP?
ADP + Pi (phosphate)
What is needed to regenerate ATP?
What are the 3 sources of fuel to make ATP?
phosphate stores (cell)
carbohydrate stores (glycogen)
fat stores (fat tissue)
Can all 3 sources of fuel be used to make ATP at the same time?
yes but different types of work favor different types of fuel
How are muscle fibers classified?
various types of work
What color are Type I fibers?
Are Type I fibers aerobic or anaerobic?
What does the color of muscle fibers show?
amount of mitochondria
Describe Type I fibers.
sustained work at slow speeds
less power but more resistant to fatigue
What do Type I fibers rely on?
Are Type IIA fibers aerobic or anaerobic?
Describe Type IIA fibers?
more power than Type I
faster speeds, more intense efforts
used when switching between slow and very fast
What do Type IIA fibers rely on?
What are Type IIA fibers used for?
activities like jumping
What color are Type IIB fibers?
Describe Type IIB fibers.
most powerful but easily fatigued
intense or explosive efforts
What do Type IIB fibers rely on?
some phosphate stores
What do Type IIB fibers produce?
Are Type IIB fibers aerobic or anaerobic?
What type of work is associated with aerobic pathways?
What type of work is associated with anaerobic pathways?