5 Day Muscle And Strength Building Workout Split, Backed by Science

Thursday: Back/Shoulders Size Workout

Rest periods: 60-90 seconds between sets.

Friday: Chest/Arms Size Workout

Rest periods: 60-90 seconds between sets.

Saturday: Legs Size Workout

Rest periods: 60-90 seconds between sets.

Ab Workout: 3X Per Week

Rest periods: 60-90 seconds between sets.

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