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Archive for fast twitch muscle fibers

Work with your Strengths

We each are born with specific genetic body-types and we have only so much we can do to transform them and shape them into our dream body. Yes, plastic surgery is one option, but in regards of fitness we are genetically inclined to do certain activities. One factor that determines our strengths and weaknesses are the amount of slow-twitch versus fast-twitch muscle fibers we are born with. Slow-twitch muscles are the muscles fibers that are best for long endurance sports, or aerobic exercise. Whereas, fast-twitch fibers are recruited when a muscle contracts for a shorter burst of energy, called anaerobic exercise. The muscles fibers are on a spectrum that ranges from Type I, slow-twitch to Type II b, very fast-twitch. Therefore, we are naturally built to accel more at one type of exercise over others. Of course, it’s important to have a well-rounded workout regime of both aerobic and anaerobic work. You may find it works much better for your specific body-type to do one type of activity over the other.

Runners going for it at the San Diego ITU Triathlon

My suggestion, as the title implies, is that go for what your body is built. If running marathons doesn’t seem to work well for you, yet you can run extremely fast 200 meter sprints, you could be more of a fast-twitch guy/girl. However, if all you’ve ever done is quick short exercises and you’ve never dabbled in the realm of endurance sports, you may not know what you’re missing! Try both and work at it to see what you’re made of. You never know unless you give it a try. Hey, you may be the next best Ironman Triathlete.

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