Fast Twitch vs Slow Twitch

PTOManiac · 01-08-2005, 09:43 PM

Is it detrimental to body-building to be mostly fast-twitch muscle? I'm not sure how to figure out what type you are, but I think I may be mostly fast-twitch muscle.

**CowPimp** · 01-08-2005, 10:38 PM

No, it's a good thing. I believe type IIa is the fiber type most prone to hypertrophy.

G-man · 01-08-2005, 10:40 PM

You have both fast & slow twitch muscle, and no its not detrimental, it would be a good thing to have more. Think of what a runner looks like; sprinter, big muscles fast and explosive, fast twitch. Marathon runner, lean stamina, slow twitch.

Machher · 01-08-2005, 11:12 PM

i read somewhere both Type IIa and Type IIx are equally prone to hypertrophy, as their main difference is endurance to strength to speed ratio.

Duncans Donuts · 01-09-2005, 12:18 AM

Fast twitch muscle fibers have the most potential for hypertrophy

**CowPimp** · 01-09-2005, 02:00 AM

Quote:

Originally Posted by Machher

i read somewhere both Type IIa and Type IIx are equally prone to hypertrophy, as their main difference is endurance to strength to speed ratio.

http://www.ironmagazine.com/archive/...ypertrophy.htm reads:

Quote:

Typically, for hypertrophy to take place your reps should be in the 4-8 range. There is no need to ever use a weight that you cannot perform at least 4 reps with, unless your goal is pure strength. There are a few reasons that I say this, one is that when you train at 90 percent or higher of your maximum weight Type IIb muscle fibers are doing the majority of the work, and this will not do much for hypertrophy.

Machher · 01-09-2005, 09:16 AM

nice post cow.. i stand corrected

01-08-2005, 09:43 PM	#1
PTOManiac Registered User Join Date: Dec 2004 Location: Pa Posts: 25	Fast Twitch vs Slow Twitch Is it detrimental to body-building to be mostly fast-twitch muscle? I'm not sure how to figure out what type you are, but I think I may be mostly fast-twitch muscle.
	Age: 25 \| Height: 6'1.25" \| Weight: 190 lbs. My job is my exercise!

01-08-2005, 10:38 PM	#2
CowPimp Fueled by Testosterone Moderator Join Date: Jan 2004 Location: Silver Spring, MD Posts: 15,428	No, it's a good thing. I believe type IIa is the fiber type most prone to hypertrophy.
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01-09-2005, 12:18 AM	#5
Duncans Donuts Stay puffed, baby. Join Date: Jul 2004 Location: CA Posts: 2,774 Photos: 2	Fast twitch muscle fibers have the most potential for hypertrophy
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01-08-2005, 10:40 PM	#3
G-man Rehabing to the Max Join Date: Jul 2004 Location: Buffalo, NY Posts: 100	You have both fast & slow twitch muscle, and no its not detrimental, it would be a good thing to have more. Think of what a runner looks like; sprinter, big muscles fast and explosive, fast twitch. Marathon runner, lean stamina, slow twitch.

01-08-2005, 11:12 PM	#4
Machher Registered User Join Date: Oct 2004 Location: Toronto, Ontario, Canada Posts: 318	i read somewhere both Type IIa and Type IIx are equally prone to hypertrophy, as their main difference is endurance to strength to speed ratio.

01-09-2005, 09:16 AM	#7
Machher Registered User Join Date: Oct 2004 Location: Toronto, Ontario, Canada Posts: 318	nice post cow.. i stand corrected