Sarcoplasmic Hypertrophy

[punyHuMaNz]

Someone please explain to me what the different types of hypertrophy are and if they matter. Heated debate between a friend of mine online and some bodybuilder was trying to say that we had to vary our rep ranges or we wouldn't grow.

[Off Road]

Here's the elementary school version...

Sacroplasmic hypertrophy
This is usually trained for with higher volume and the goal is to increase the energy stored withing the muscle. This creates a swelling of the muscle making it larger. This type of hypertrophy is the easiest lost when training is diminished. Some numbers indicate that it will be responsible for ~20% of overall potential.

Myofibrilar Hypertrophy
This type of hypertrophy is usually trained for with heavier weights and fewer reps. This type of hypertrophy makes the actual muscle tissue larger. It will remain longer when training is decreased. Some numbers indicate that it will be responsible for ~80% of overall potential.

Feel free to add more college level talk to this