IRON FORGE CALCULATOR
⚡ WESTSIDE CONJUGATE STRENGTH TOOL

Conjugate Band Tension &
Dynamic Effort Wave Calculator

Scientifically plan your 3-week Westside pendulum waves (50% / 55% / 60%), calculate exact barbell weight vs. accommodating resistance band tension, and see visual plate loading per sleeve.

⚙️ Training Max & Implements
LBS
⏱️ 45-60 seconds strict rest

🌊 3-Week Dynamic Effort Pendulum Wave

Week 1
50%
Speed Acceleration Base
Bar Weight: 205 lbs
Band / Chain Top: +80 lbs
Total Peak Load: 285 lbs
Sets & Reps Scheme
10 × 2 @ 45s rest
Week 3
60%
Peak Velocity & Reset
Bar Weight: 245 lbs
Band / Chain Top: +80 lbs
Total Peak Load: 325 lbs
Sets & Reps Scheme
8 × 2 @ 60s rest
🏋️ Barbell Sleeve Loading Diagram (Week 2 Highlight)
Bar: 45 lbs | Per Side: 90 lbs
📈 Accommodating Resistance Curve (Bottom to Top)
Dynamic Peak Tension
Bottom Reversal Top Lockout 250 lbs 305 lbs

Never do bar math at the rack with chalk on your hands again.

Iron Forge has these exact Westside 3-week pendulum waves, accommodating resistance band calculators, and specialty bar tare formulas built directly into your active workout logger. Every variation gets its own isolated PR record.

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The Science of Dynamic Effort (DE) Waves

Developed by Louie Simmons at Westside Barbell, the Dynamic Effort (DE) method trains the Rate of Force Development (RFD). Rather than moving maximum weight slowly, athletes move submaximal weights with maximum explosive acceleration.

1. The 3-Week Pendulum Wave

Bar weight progresses in a 3-week wave: 50% → 55% → 60%. Never exceed 60% bar weight on speed days, as bar velocity drops below optimal kinetic thresholds (0.8 – 1.0 m/s). After Week 3, the wave is reset back to 50%.

2. Accommodating Resistance

Bands and chains match the human strength curve. As your mechanical leverage improves near lockout, the bands stretch, preventing you from decelerating the bar. Band tension should average 25% of your 1RM at lockout.

3. Strict Rest Intervals

Dynamic work requires complete phosphagen recharge without metabolic fatigue. Enforce strict 45-second to 60-second rest intervals between sets (10-12 sets of 2 for squats, 8-9 sets of 3 for bench press).

Frequently Asked Questions

What percentage of 1RM should be used for Dynamic Effort speed work? +
In the Westside Barbell conjugate method, Dynamic Effort (DE) waves follow a 3-week pendulum wave: Week 1 uses 50% bar weight, Week 2 uses 55%, and Week 3 uses 60% of your 1RM. In addition to bar weight, accommodating resistance (bands or chains) adds approximately 25% of your 1RM at lockout.
How much band tension should I add to my squat and bench press? +
For standard Dynamic Effort work, band tension at lockout should equal approximately 25% of your 1RM. For lifters with a 400 lb squat, that is approximately 100-120 lbs of band tension at the top (e.g. Doubled Mini Bands or Monster Mini Bands). For bench press, Mini Bands typically add 40-50 lbs at lockout, while Monster Mini Bands add 70-80 lbs.
How does bar tare weight affect plate loading on specialty bars? +
Specialty bars have non-standard tare weights. For example, a Safety Squat Bar (SSB) or Giant Cambered Bar typically weighs 65 lbs (29.5 kg), an Axle / Fat Bar weighs 20 lbs (9 kg), and a Buffalo / Bow Bar weighs 55 lbs (25 kg). To hit your target bar weight, you must subtract the bar's tare weight before dividing by 2 to determine the plates required per sleeve.
How do you reset a Dynamic Effort wave after Week 3? +
After completing Week 3 at 60% bar weight + bands, never continue to 65% or 70% as speed drops significantly. Instead, reset the pendulum wave back to 50% (Week 1). In conjugate training, lifters also rotate their primary variation (e.g. switching from a Safety Squat Bar to a Straight Bar or changing box heights) to prevent neuromuscular accommodation.