Well, that’s just like, your opinion man.
Another guys opinion;
“The beautiful thing about isometric contractions in regards to metabolic stress is that they literally drive fluid into your muscle while inhibiting any of it from leaving. Think about it like putting a kink in a hose without turning off the faucet. The incoming blood flow doesn’t stop, and there is nowhere for the rest of the fluid to go. The intracellular pressure will obviously increase, as will the concentration of our crucial metabolites. Increased pressure+more metabolites= grow time baby.”
-Dr John Rush in
“Maximizing Metabolic Stress with Intensity Techniques for Hypertrophy.”