Q: I’ve been reading that testosterone is the key muscle-building hormone, so what is the best way to get it up?

A: “Get it up?” Perfect way to end your question about testosterone. LOL! Arthur Jones, the creator of Nautilus machines and the overseer of the Colorado Experiment that saw Casey Viator gain 60 pounds of muscle in only 4 weeks, always said that training legs hard can have a big “indirect muscle-building effect.”

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