3245: Fast Twitch vs. Slow Twitch: What Kind of Muscles Do You Want by Steve Kamb of Nerd Fitness on Training for Performance

Optimal Health Daily - Fitness and Nutrition

Optimal Living Daily LLC

Fitness, Nutrition, Health & Fitness

4.5 • 677 Ratings

🗓️ 3 January 2026

⏱️ 7 minutes

🔗️ Recording | iTunes | RSS

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Summary

Discover all of the podcasts in our network, search for specific episodes, get the Optimal Living Daily workbook, and learn more at: OLDPodcast.com. Episode 3245: Steve breaks down the science behind muscle fibers, Type I, Type IIa, and Type IIb, and how they determine your natural strengths in endurance versus explosive power. With the right training, you can shift your muscle composition to align more closely with your goals, proving that genetics set the stage, but effort shapes the performance. Read along with the original article(s) here: https://www.nerdfitness.com/blog/fast-twitch-vs-slow-twitch-what-kind-of-muscles-do-you-want/ Quotes to ponder: "Type I fibers are 'slow twitch' fibers. They use oxygen to fire, and they take longer to get going, but they can go for a longer period of time without getting tired." "Type IIb fibers are 'fast twitch' fibers. These fire anaerobically (without oxygen), they fire extremely quickly, but they get tired easily." "Your muscle fiber composition is already built into your genetics." Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0	This is Optimal Health Daily.
0:02.8	Fast Twitch versus Slow Twitch.
0:05.3	What kind of muscles do you want?
0:07.0	By Steve Cam of nerdfitness.com.
0:09.7	And I'm Dr. Neal, your very own personal narrator.
0:13.1	Hey there, happy Saturday, and welcome back to another weekend edition of Optimal Health Daily.
0:18.4	This is where I read to you from some of the best health and fitness blogs
0:21.4	on the web, and always with my commentary at the end. I'm going to keep this intro nice and short,
0:27.8	so let's get right to today's post as we optimize your life. Fast Twitch versus Slow Twitch.
0:37.9	What kind of muscles do you want?
0:39.8	By Steve Cam of nerd fitness.com.
0:43.4	All right, folks, this article is going to jump into the more scientific side of fitness,
0:48.7	but it's still fascinating and something you should know.
0:52.1	Ask yourself this question.
0:53.8	Do you want to be able to run ridiculously fast for a short period of time? and something you should know. Ask yourself this question.
0:56.9	Do you want to be able to run ridiculously fast for a short period of time?
0:58.8	Or do you want to be able to run for hours and hours
1:01.2	without wearing down?
1:03.4	Believe it or not, your muscles are composed of certain fibers
1:06.6	that are already destined to be one or the other.
1:13.0	However, with enough proper training,
1:18.7	you can actually control how much of each type of fiber you have in that body of yours.
	...

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