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  #1  
Unread 05-03-2008, 05:33 AM
Sugar Sugar is offline
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Default Turning low twitch fibers into fast twitch

Do you think that is possible to turn, through heavy lifting (8 RM or less), low twitch fibers into fast twitch?. Literature is confused with respect to this; some says that it's possible (to some extent); some says that it's possible the opposite (fast to low twitch) but not this one.
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  #2  
Unread 05-03-2008, 09:04 AM
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generally speaking, no short of switching the motor nerves
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Unread 05-05-2008, 08:17 AM
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Originally Posted by lylemcd View Post
generally speaking, no short of switching the motor nerves
So, although a couple of low twitch fibers siwtch to fast twitch, as the nerve that inervate them is still low threshold the fibers can't fire as fast twitch. I need to read the rules post.I need to read the rules post.I need to read the rules post.I need to read the rules post..
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Unread 05-05-2008, 08:47 AM
Espi Espi is offline
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But surely you can grow new muscle with a changed capacity?
I mean it's not like 'turning fat into muscle or vice versa'. You just lose muscle/fat and grown new fat/muscle cells. Right?

It can't be you are 'I need to read the rules post.I need to read the rules post.I need to read the rules post.I need to read the rules post.ed' forever to have one specific ratio
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  #5  
Unread 05-05-2008, 10:26 AM
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Quote:
Originally Posted by Sugar View Post
So, although a couple of low twitch fibers siwtch to fast twitch, as the nerve that inervate them is still low threshold the fibers can't fire as fast twitch. I need to read the rules post.I need to read the rules post.I need to read the rules post.I need to read the rules post..
the physiological cahracteristics may switch sliglhtly but without switching the motor nerve, it's still a type I fiber
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Unread 05-05-2008, 10:27 AM
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Quote:
Originally Posted by Espi View Post
But surely you can grow new muscle with a changed capacity?
I mean it's not like 'turning fat into muscle or vice versa'. You just lose muscle/fat and grown new fat/muscle cells. Right?

It can't be you are 'I need to read the rules post.I need to read the rules post.I need to read the rules post.I need to read the rules post.ed' forever to have one specific ratio
type IIb always shift to IIA when recruited

you can't switch between Type II and Type I for the most part as that is determined by the motor nerve
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  #7  
Unread 05-05-2008, 02:36 PM
Sugar Sugar is offline
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What do you mean by "shift to IIa when recruited"?.
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  #8  
Unread 05-06-2008, 09:42 AM
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whenever you recruit Type IIx (which are the rough human 'equivalent' of IIb in humans) they will change into IIa fibers. that's the major shift and IIx appear to be 'reserve fibers'.

when you detrain for several months, IIa turn back into IIx but it's irrelevant in the big scheme of things

lower body paraplegics also have massive numbers of IIx in their legs
since they are essentially in an endless detraining state
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