
Tactical Barbell: Definitive Strength Training for the Operational Athlete

Instead of grinding out 200x5x5 sets try something like 185x5, 205x5, 195x5, 210x5, 190x5, 200x5, 185x5.
Pavel Tsatsouline • Beyond Bodybuilding: Muscle and Strength Training Secrets for The Renaissance Man
If you are training for strength and are not concerned with mass you will be better off doing 1x5 every day rather than 5x5 every five days.
Pavel Tsatsouline • Beyond Bodybuilding: Muscle and Strength Training Secrets for The Renaissance Man

The key is the Delta 20 Principle. It means that a minimum volume change from one training unit to the next is 20 percent. Thus, “∆ 20 %” or “Delta 20.”