The gym god himself Jim Stoppani , gives you the breakdown on “microcycles”.
The Shortcut to Size program is based on microcycled periodization. Research shows it’s most effective for strength gains and increasing muscle size. The Shortcut to Size is a 12-week program composed of 12 one-week microcycles. Each microcycle lasts one week, after which you change rep ranges and weights. The constant cycling creates muscle confusion, forcing your body to adapt to the new rigors.