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Type I muscles
fast twitch muscle fiber
white fast twitch fibers
white fast twitch fibers
It is not the muscle but the muscle fiber which works for when recruited for long duration. The red muscle fiber or the slow twitch fiber gets recruited for long term stress on the muscle for example if you do bench press on heavy weight explosively for 5 reps you extensively use fast twitch fibers but if you do bench flys for 15 reps in controlled fashion, you extensively use red fibers.
I think you are thinking of fast twitch muscles. There are two kinds fast twitch and slow twitch.
Slow twitch fibers Slow-twitch fibers are muscle fibers that are used more when compared to the rest. Your legs are full of slow-twitch fiber because you are on your feet much of the time. Another name given for slow-twitch fiber is endurance fiber because they have been forced to adapt via being used so frequently and that is why it is harder for them to grow. Fast Twitch Fibers Fast-twitch fibers are then obviously easier to grow because they are used less. When you are working out it is like they are being challenged for the first time. That is the reason why people see the most gains with these muscles when they first start working out.
Slow twitch and fast twitch A muscle fibers.
slow twitch and fast twitch
The three type of muscle fibers are fast-twitch, slow-twitch, and hybrid.
Slow twitch fibers Slow-twitch fibers are muscle fibers that are used more when compared to the rest. Your legs are full of slow-twitch fiber because you are on your feet much of the time. Another name given for slow-twitch fiber is endurance fiber because they have been forced to adapt via being used so frequently and that is why it is harder for them to grow. Fast Twitch Fibers Fast-twitch fibers are then obviously easier to grow because they are used less. When you are working out it is like they are being challenged for the first time. That is the reason why people see the most gains with these muscles when they first start working out.
I'm not sure what exactly you want to know about the muscle fibers and I'm no expert, but here is how I understand it. Swimmers tend to exercise fast twitch and slow twitch muscles in they're workouts. The fast twitch are engaged during sprint sets and the slow twitch are engaged during aerobic sets. So all swimmers have well developed fast and slow twitch muscles. Good sprinters will probably have 60 to 70 percent fast-twitch muscle, while good long distance swimmers may have around a 50/50 split. Whether or not weightlifters have fast or slow twitch muscles depends on the type of workout they do. Sets consisting of fast, explosive lifts will build more fast twitch muscle fibers, and longer, slower sets will build slow twitch muscle fibers. That's one reason why plyometric workouts are effective for any athlete who needs flat-out speed; the fast-twitch muscles are engaged and enlarged through fast, explosive training. Besides that, a muscle fiber is a muscle fiber as far as I know. To be a great swimmer you have to incorporate a weight regimen into your training plan, so the swimmers and weightlifters will be similarly built, outside of the fast/slow twitch differences. I hope that helps. And if anyone else out there has something to add, I'd like to know more myself.