What is Dynamic effort?

What is Dynamic effort?

Dynamic effort is the speed-focused counterpart to max-effort training: rather than working up to the heaviest possible load, a lifter moves a lighter, fixed percentage of their max as fast as their body can produce force. It targets a part of the force-velocity curve that pure max-effort work can't reach — max effort trains the ability to produce very high force slowly, while dynamic effort trains the ability to produce force quickly, which is what carries over into a fast bar off the chest or out of the hole on a heavy attempt.

How it works

Force output and movement velocity trade off against each other — the heavier the load, the slower the bar moves, and vice versa. Dynamic effort deliberately trains the faster end of that curve by keeping the load light enough (50-60% of 1RM) that a lifter can accelerate it maximally for the whole rep, building rate of force development rather than absolute strength. Accommodating resistance (bands or chains) is often added so the bar gets progressively heavier as it nears lockout, forcing continued acceleration through a range where a plain barbell would otherwise decelerate — a key reason Westside pairs dynamic effort with bands and chains rather than straight weight alone.

The scale

The classic Westside dynamic-effort loading scheme, waved over three-week cycles (e.g. 50% → 55% → 60%) to keep the stimulus progressing without overloading the joints.

How to apply it

• Pick a competition-style variant: Use the actual squat, bench or deadlift pattern (not a max-effort variation) so the speed work transfers directly to the competition lift.
• Load to 50-60% of 1RM: Load conservatively enough that every rep can be moved at near-maximal intended speed, not just moderately fast.
• Add bands or chains (optional): Accommodating resistance keeps the bar accelerating through lockout instead of decelerating, which happens naturally with straight weight.
• Move every rep with maximal intent: The goal is bar speed, not fatigue — stop the set the instant intended speed can't be maintained.
• Rest 45-60 seconds: Short rests keep the session brisk without so much fatigue that later sets slow down.

Worked example

A lifter with a 180 kg back squat 1RM runs a DE lower day at 60%.

A lifter tracking bar speed with a velocity-tracking app can see exactly when speed starts to fall off, which is the practical cue to stop a dynamic-effort session even if more sets were planned.

Dynamic effort vs max effort

Westside pairs the two on separate days each week specifically because neither method alone trains the whole force-velocity curve.

Common misconceptions

• "Dynamic effort is just speed squats with no real purpose." It specifically trains rate of force development — the ability to produce force quickly — which max-effort work at slow, heavy loads doesn't train on its own.
• "You must use bands or chains to do dynamic effort work." Straight-weight dynamic effort still builds bar speed; accommodating resistance is a common enhancement, not a requirement.
• "Heavier is always better for a dynamic-effort set." Going much above ~65-70% of 1RM turns the set into a grind rather than a speed set, defeating the purpose of the method.

Related terms

Dynamic effort FAQ

What is dynamic effort training?

It's a method that moves a submaximal load (usually 50-60% of 1RM) as explosively as possible for low reps across many sets, used to build the rate of force development that heavy, slow max-effort work doesn't train.

What percentage should I use for dynamic effort?

The classic range is 50-60% of one-rep max, often waved up a few percent every 1-3 weeks. Going much heavier turns the set into a grind instead of a speed set.

Do I need bands or chains for dynamic effort work?

No — they're a common enhancement that keeps the bar accelerating near lockout, but straight-weight dynamic effort still trains bar speed effectively without any special equipment.

How is dynamic effort different from max effort?

Dynamic effort uses light loads moved as fast as possible to train speed and rate of force development, while max effort uses near-maximal loads worked up to a true 1-3 rep max to train absolute strength.

How many sets and reps are typical for dynamic effort?

A common scheme is 8-10 sets of 2-3 reps with 45-60 seconds of rest, keeping every rep fast — the set count matters less than making sure bar speed stays high throughout.

References

1. The Dynamic Effort Method. Westside Barbell blog
2. The Basics of Dynamic Effort. Westside Barbell blog
3. Effect of compensatory acceleration training in combination with accommodating resistance on upper-body strength. J Strength Cond Res / PMC4128835
4. The Conjugate Method: How to Do It, Benefits, and More. Healthline