Cut the isolation exercises as they do not provide enough stimulus for muscle growth. (fitnessandpower.com)
In order to increase the mitochondrial density, you should target the body with enough stimulus in the form of mechanical stress so that you give it a reason to grow more mitochondria. (fitnessandpower.com)
Low frequency training can't provide enough stimulus for your muscles to grow and will limit your progress. (fitnessandpower.com)