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Old 02-04-2013, 08:47 AM   #1
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Max Brawn

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Question Myofibrillar and Sarcoplasmic Hypertrophy...

The science behind muscular development got me interested, so I decided to do some research of my own.

I found out about the two different types of hypertrophy, Sarcoplasmic and Myofibrillar. Something I didn't know existed until now.

Heres what I found out, please correct me if im wrong.
with Sarcoplasimic Hypertrophy, The amount of sarcoplasm increases inside the muscle, which makes i look bigger. Apparently though it doesn't last very long, and will disappear fairly quickly if you stop training.
Sarcoplasmic hypertrophy also has no direct carry over to strength because it doesn't have the ability to contract and relax, as it isn't real muscle. Its also said that it gives you a puffier look to your muscles.

Myofibrillar hypertrophy on the other hand, is the actual growth of muscle fibres. The muscle looks more dense, and theres a direct carry over to strength.

Apparently different rep ranges trigger different types of hypertrophy, and although neither happen exclusively to the other, training in a higher rep range, provides the lifter with more sarcoplasmic hypertrophy, and training with a lower rep range, gives you more myofibrillar hypertrophy.
Sarcoplasmic hyp is utilized more by pro bodybuilders, and myofibrillar triggered by powerlifters and strength athletes.

I dont know about you but when I look at the two, Myofbrillar hyp seems allot better. The sarco way seems sort of superficial.

For strength, its known that low reps are best, but in terms of bodybuilding, there still seems to be a huge debate about this, and no one seems to really know the answer.
I think allot of this confusion is due to the fact that no ones the same. Whilst higher reps might work best for one for muscle growth, lower reps could work best for someone else.

I also found theres allot of iggnorance on the internet. The majority of bodybuilders disregard low reps, and preach that high reps is the only way to get big, without doing any actual research.
Now powerlifters are big guys, they have huge muscles, and there dense and like a rock.So to say "low reps dont build size" doesn't actually make any sense.

To me the whole thing seems really complicated, The information I've found seems very black and white, and i'd really appreciate your opinion on this.

How does all of this really work, and whats really happening in your muscles when you workout?
Id like to think I was to be building REAL contractile tissue these next few years, not the ability to retrain fluid and just LOOK bigger and stronger.

Thanks guys
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