With all of the different training protocols out there, you might be asking why you should even bother with high volume training. … Sure high intensity training takes less time, but it is not more effective for building size and strength.
What does volume training do?
Broadly speaking, increasing your exercise volume improves fitness and endurance. Increasing intensity builds lean muscle mass and strength. This is not a cut-and-dried rule. Any exercise you do will improve your fitness, endurance, muscle mass, and strength to varying degrees.