I’ve found that the best strength training program for muscle gain depends on your experience level and goals. For beginners, 'Starting Strength' by Mark Rippetoe is a solid choice—it focuses on compound lifts like squats, deadlifts, and bench presses, which are essential for building a strong foundation. The PDF is straightforward and easy to follow, making it perfect for newcomers.
Intermediate lifters might prefer '5/3/1' by Jim Wendler, which offers a more structured approach with progressive overload. It’s great for long-term gains and includes variations to keep things fresh. For advanced lifters, 'The Texas Method' provides a challenging weekly progression that pushes limits. Each of these programs has PDF versions available online, and they all emphasize consistency, proper form, and gradual progression—key elements for muscle growth.