The debate between Mike Mentzer and Arnold Schwarzenegger is not just historical. It represents one of the biggest controversies in hypertrophy training: high volume vs low volume, high frequency vs low frequency, and training to failure vs leaving repetitions in reserve. Both built legendary physiques. But, according to current scientific evidence... Who was really right? Mike Mentzer VS Arnold Schwarzenegger 1) High volume vs low volume: which generates more hypertrophy?