The golden age of bodybuilding (think Arnold Schwarzenegger before Terminator and Predator) produced much of the training wisdom that trickled down to everyday lifters in commercial gyms. They were ahead of the curve and the science, figuring out a lot of what you use in today’s workouts. Many of the classic ideas also missed the mark but live on in the gym next to you.

Here are four classic updated training principles and training myths that will keep your muscles up and progressing toward your fitness goals.

The Weider Principles

The Weider Principles

Build the perfect routine - or make any workout better -— with these tried-and-true training princip...

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Four Updated Training Principles: