Bodybuilding Anatomy -

Effective bodybuilding splits are typically organized around seven primary muscle groups, each requiring specific mechanical tension to grow:

A massive group encompassing the quadriceps , hamstrings , glutes , and calves (often cited as the hardest muscle to grow due to high-frequency daily use). Bodybuilding Anatomy

Targeted through core stabilization and trunk flexion to define the midsection. Principles of Muscle Growth (Hypertrophy) Bodybuilding Anatomy