Exercise Modes for Strength Flashcards
fiber types
Type I
Type IIA
Type IIB/X
type I fiber type
slow twitch oxidative
Type IIA fiber
fast twitch oxidative
smallest fiber diameter is what type of oxidative
slow
intermediate fiber diameter is what type of oxidative
fast
largest fiber diameter
fast glycolytic
what type of muscle size is recruited 1st
slow oxidative
what type of muscle size is recruited 2nd
fast oxidative
what type of muscle size is recruited 3rd
fast glycolytic
factors of muscle performance
- fiber type
- fiber diameter
- recruitment
- muscle size
during hypertrophy there is an increase in what
- cross-sectional area (CSA)
- Force production
hyperplasia is
new, additional fibers
fiber type in the untrained
50 type II /50 type I
fiber type in long distance runner
60-70% type I
Fiber types in sprinters
80% type II
there is evidence of muscle fiber type shift of what muscle fiber types
Type IIX to Type IIA and vice versa
what are principles of muscle performance
- force velocity relationship
- length-tension relationship
- architecture
with the force-velocity relationship, during small loads muscles do what
increase speed of shortening
with the force-velocity relationship, during high loads muscles do what
slows the speed of shortening
with length-tension relationship, a muscle’s capacity to produce force depends on what?
-length, with max force near the muscles resting length
Muscle performance Architecture is
the arrangement of muscle fibers relative to the axis of force generation
when the architecture of the sarcomeres are in series it produces
velocity
when the architecture of the sarcomeres in parallel it produces
high force
what influences muscle fatigue
CNS
cross bridges
what is neurologic recruitment & adaptation responsible for
early increases in strength
neurologic recruitment & adaptation include
- agonist
- synergists
- antagonist
what are modifiers of muscle performance
- age
- psychological & cognitive factors
- mental preparatin
- drugs
- fatigue
how is childhood and preadolescent modify muscle performance
neuromuscular adaptation
women muscle peak at what age
20