Muscle Fibre Types - UK-Muscle Body Building Community

AR77 · 20-05-2008, 03:37 PM

Hey all, recently I've been reading about the slow twitch and fast twitch fibre types for training. Could anyone tell me what are examples of body parts which fall into the category of each?

Thanks.

thestudbeast · 20-05-2008, 03:41 PM

It's different for everyone.

Generaly calfs are slow twitch, legs are mixed fibre as are shoulders, the other muscles depend very much on the individual.

There are tests you can do but in general it's best to start off training each muscle as if it's fast twitch and see which muscles respond and which don't.

Tatyana · 20-05-2008, 05:57 PM

It is different for everyone, but another general rule of thumb is hams are fast twitch, biceps fast, triceps slow, but there is no guarentee, it is all about genetics.

Slow twitch are also called type IA, and respond best to 50-60% intensity (1 RM), rep range of 12-20, they are usually more useful for endurance type things, long distance running for example.

Fast twitch are either type 2A or 2B, work best in either 70-80 % or 85-100% intensity, rep range 6-12, used in power movements.

There are ways you can test for your fiber type. It takes about a week though, but there really isn't any point unless you really are not making any progress.

20-05-2008, 03:37 PM	#1 (permalink)
AR77 Newbie Trainer Join Date: Mar 2008 Posts: 26	Muscle Fibre Types Hey all, recently I've been reading about the slow twitch and fast twitch fibre types for training. Could anyone tell me what are examples of body parts which fall into the category of each? Thanks.

20-05-2008, 03:41 PM	#2 (permalink)
thestudbeast bann3d Join Date: Jul 2007 Location: Weston super mud Posts: 1,360	Re: Muscle Fibre Types It's different for everyone. Generaly calfs are slow twitch, legs are mixed fibre as are shoulders, the other muscles depend very much on the individual. There are tests you can do but in general it's best to start off training each muscle as if it's fast twitch and see which muscles respond and which don't.

20-05-2008, 05:57 PM	#3 (permalink)
Tatyana My name is EARL Join Date: Jan 2006 Location: On my bloody bike doing cardio Posts: 3,463	Re: Muscle Fibre Types It is different for everyone, but another general rule of thumb is hams are fast twitch, biceps fast, triceps slow, but there is no guarentee, it is all about genetics. Slow twitch are also called type IA, and respond best to 50-60% intensity (1 RM), rep range of 12-20, they are usually more useful for endurance type things, long distance running for example. Fast twitch are either type 2A or 2B, work best in either 70-80 % or 85-100% intensity, rep range 6-12, used in power movements. There are ways you can test for your fiber type. It takes about a week though, but there really isn't any point unless you really are not making any progress.

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