Unlocking Strength and Density: Block 6 - Cluster Set Training Protocol
- Thomas Sobotor
- Jun 1
- 2 min read

This block we will dig into cluster set training—a powerful method used by elite athletes and built around the foundational principles taught by strength legend Charles Poliquin.
This workout merges Poliquin-style cluster sets with stability-driven hypertrophy work, functional core training, and metabolic finishers to deliver a comprehensive, performance-oriented session.
Main Lift Protocol: (A-Series) Cluster Sets

This is where the heavy lifting happens—literally. The A-series is made up of two exercises structured with intra-set rest periods to allow heavier training loads and better neurological efficiency.
A1: Strength Cluster Set (3-3-3 Reps)
3 mini-sets of 3 reps
Rest 10–15 seconds between each mini-set
1 full cluster = 9 total reps
High load (~85–90% 1RM)
Go directly to A2 when complete
A2: Volume Cluster Set (6-6-6 Reps)
3 mini-sets of 6 reps
Rest 10–15 seconds between each mini-set
Moderate load (~65–75% 1RM)
Designed to increase total volume and time under tension
Rest 2–3 minutes after A2. Complete three total rounds of the A1/A2 pairing.
Supplemental & Accessory Circuit: Stability + Functionality

After you've hit your big lifts, it's time to build muscular balance, hypertrophy, and athletic function. You'll rotate through four Series B - Series C pairings, moving directly from a Supplemental (B-series) to an Accessory (C-series) exercise with limited rest between.
Supplemental (B-Series): Hypertrophy + Stability Focus
These exercises emphasize joint stability, unilateral control, and hypertrophy.
Examples:
Overhead Presses
Push Ups
KB Swings
RDL's
Bridges
Dips
Accessory (C-Series): Core
These target core strength, movement control, and functional integrity.
Examples:
Loaded Carries
Anti Rotational Exercises (Planks, Paloff, etc.)
Core Stability, control and strength movements (Dead Bugs, Sit Ups, Chops)
Move through this B → C sequence continuously until you've completed all pairings once. Then move to the Finisher.
Finisher: Engine & Grit

To close the session, hit a high-intensity finisher designed to condition your energy systems and push your mental edge. Choose one of the following per round:
Sprint – 100m
Row or Ski Erg – 200m sprint pace
Jump Rope – 100 Jumps under 60 seconds
Sled Drags – Heavy drag, 20–30 yards down and back
After the finisher, rest 1–2 minutes, then repeat the full B-C circuit + finisher for three total rounds.
Training Flow Recap
Main Lift – Cluster Sets
A1: 3x(3-3-3)
A2: 3x(6-6-6)
Rest 2–3 minutes between full A1/A2 sets (3 rounds total)
Supplemental & Accessory Circuit
B1 → C1 → B2 → C2 → B3 → C3 → B4 → C4
Complete once
Finisher (Pick One Per Round)
Sprint, Row/Ski Erg, Jump Rope, or Sled Drag
Rest and repeat the entire circuit + finisher 3 total rounds
Why This Program Works
This training structure combines:
High-load neural demand (via clusters)
Hypertrophy and stabilizer activation (via supplemental B-series)
Core and functional development (via accessory C-series)
Energy system conditioning (via finishers)
By blending intensity, structure, and movement variety, we're not just building strength—we're building a resilient, athletic, and powerful body.