Just to get started:
Adaptations to Endurance Training
• Little/no increase in CSA of all fiber types
• Fiber type shift
– Increase % of Type I and Type I/IIa hybrid fibers
– Decrease % of Type IIx fibers (fast - days)
– Decrease % of Type IIa fibers (slow – years)
• Increase in muscle oxidative capacity
• Increase in mitochondrial density
• Increase capillary to fiber ratio
• No increase in glycolytic enzymes
– Possible increase in very intense training
• Increase in fatty acid oxidation, increase intramuscular lipid stores
• These changes lead to a delay in the onset of metabolic acidosis, increased resistance to fatigue, increased VO2max
Adaptations to Resistance Training
• Increase in muscle CSA (hypertrophy) in all fiber types – including Type I (usually)
– May be increase in fiber number, but size is most change
– Increase in number of nuclei per fiber (maintain nuclear domain size)
– Satellite cell proliferation
– Increase in muscle power
• Fiber type shift
– Decrease in % Type I fibers
– Increase in % Type IIa fibers
– Decrease in % Type IIx fibers
• Metabolic changes
– Decreased mitochondrial density, but due to hypertrophy, not fewer mitochondria per fiber
– No change in capillary:fiber ratio (but may be decrease in capillary density)
– No change in VO2max
• Fluck and Hoppeler, 2003
(general explanation copied from exercise physiology texts I don't remember where)
__________________
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
or
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
If you act sanctimonious I will just list out your logical fallacies until you get pissed off and spew blasphemous remarks.
Last edited by EricT; 11-20-2008 at 05:37 AM.
|
Hybrid Mode