What causes muscle growth? Point blank, destroying your muscle fibers. What happens is the muscles fibers are weakened and then damaged while lifting weights. Once the muscles are damaged your body realizes it needs to repair them. It's starts sending amino acids and protein building blocks to repair the damaged muscles.

It's why weight lifting professionals have long advocated short reps with maximum weight. The more you can damage the muscle, the bigger your muscles become when the body starts the repair process.

You have probably have heard the old adage of 1.5 grms of protein per your own body weight. It's essential your protein intake is escalated when performing heavy lifting. You also have heard about takes complex carbohydrates immdietly after working out. The reason for this is to add in the repair process.

Let look at what causes muscle growth more indepth. You lift a certain muscle like the biceps. If you lift light weights with lots of reps, say 20 reps. The muscle fibers are only being damaged on the surface. Hence, this is a great way to build strength and not size. But, if you lift the heavy weights and use maximum effort, coupled with lower reps. You can see how you start to damage the muscle deeper. When you damage the muscle deeper, the body senses it. It starts to being preparations to repair the muscle damage almost immediately. The thirty minutes directly after lifting are your most important time frame. This is when the body sends it's army of soldier to begin repairing the muscle.

Most individuals have both fast twitch and slow twitch muscle fibers in each muscle. When you can damage both types, your size increases. It's why it' ssuch a powerful combination to lift heavy with low reps. When you can destroy both types of muscles. Your gains can be explosive.

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