GZCLP T3: Choosing and Progressing Accessory Work

The original GZCLP prescribes a single T3 exercise per session. Not three, and not a freely assembled list: lat pulldowns in the A sessions, dumbbell rows in the B sessions.

That is a sensible starting point, because the squat, bench press, deadlift and overhead press contain no vertical or horizontal pull of their own. T3 fills that gap with lighter, higher-rep work. Only once the base program is running stably does it gradually become more.

If T1, T2 and the scheme chains are not yet familiar, start with the complete GZCLP guide. This article is only about the third tier.

What the original actually lists as T3

Fact from the original: Lefever names rows, lat pulldowns or — where possible — pull-ups as the first T3 movements. A session therefore starts out with five T1, three T2 and three T3 working sets.

“3×15+” means three sets of the same exercise. The plus belongs to the last set and makes it an AMRAP. It does not mean three different accessory exercises.

How 3×15+ works in practice

The first two sets stop at 15 reps. In the third set you perform additional technically clean reps and, following Lefever’s general AMRAP rule, leave one to two reps in the tank.

An example for lat pulldowns at 45 kg:

The original rule: The weight only goes up once the last set reaches 25 reps.

Practical recommendation: Use the smallest sensible jump after that. On a cable stack that might be 2.5 or 5 kg; with dumbbells it depends on the increments available. Lefever explicitly recommends modest T3 increases, because large jumps on these exercises quickly cost several reps.

If even one of the first two sets fails to reach 15 clean reps, the base volume has been missed that day. That is not a reason to force reps with momentum. Hold the weight, check technique and recovery, and reduce it if you miss repeatedly.

Why lat pulldowns and rows come first

The four T1 and T2 exercises cover a lot of muscle, but their movement directions are unevenly distributed:

• Bench press and overhead press are pressing movements.
• Squat and deadlift mainly train knee and hip extension.
• None of the four is a vertical pull like a lat pulldown.
• None is a horizontal pull like a row; a deadlift does not replace a rowing movement.

Lat pulldowns and dumbbell rows therefore do not simply add “more back”. They insert two missing pulling patterns. That is the program author’s selection, and so it is the default answer if you want to run GZCLP unmodified at first.

Pick further T3 work by a specific job

Once you expand the plan, there is no longer one official ranking that applies to everyone. The next exercise should have a recognisable purpose.

This is editorial guidance, not an order of operations prescribed by Lefever. An added leg curl is not automatically wrong just because squats and deadlifts are already in the plan. It simply has to serve a purpose and fit into your recovery.

For any addition, one question helps: which job does this exercise solve that the current plan does not already cover well enough? If the answer is only “do more”, the extra slot is probably not needed yet.

When a second T3 becomes worthwhile

Lefever’s recommendation is more conservative than many widely circulated GZCLP templates: only once recovery is stable and two to three progression cycles are complete should extra volume be built from the bottom up — that is, through T3 first.

For the transition to a more individual GZCL plan he describes a staged approach:

1. Add a second T3 movement with one set of 8–10 reps to start.
2. If that is tolerated well, add another set the next time it comes around.
3. Build the volume up gradually to roughly 30 base reps.
4. Only ever judge one change at a time, and use no more than three T3 movements per session in total.

None of this is mandatory for GZCLP. It is Lefever’s bridge from the simple template to a self-adjusted GZCL model.

Practical rule of thumb: A new T3 is well tolerated if T1 and T2 keep running to plan, technique does not visibly suffer, and the fatigue has cleared by your next session. A single bad training day proves nothing. But if performance repeatedly drops right after a volume increase, take the most recent addition back out first.

Replacing T3 sensibly without a cable stack

A substitute should preserve the same job wherever possible:

Unassisted pull-ups are only a direct 3×15+ substitute if you can hit the base reps under control. For many beginners an assisted variant fits better. Alternatively you can progress pull-ups separately with a lower rep target — at which point you are deliberately no longer using the original T3 rule.

How much volume three T3 slots really add

The original comes to at least 45 T3 reps per session. Three fully executed T3 slots come to at least 135. That is 90 extra reps and six extra working sets.

That raw number is not a precise measure of muscle growth: a rep of lateral raises is not comparable to a rep of squats, and different T3 exercises load different muscle groups. The figure only shows how much the size of the session changes.

The practical consequence is clear all the same: two additional T3 slots are not a decorative finish. They raise the workload noticeably, and should therefore be introduced one after another rather than all at once.

What the hitPR plan shows

The GZCLP plan in hitPR deliberately includes exactly one T3 pulling movement per session. The full-gym variant uses lat pulldowns in the A sessions and one-arm dumbbell rows in the B sessions. The free-weights variant uses unassisted pull-ups in the A sessions and the same dumbbell row in the B sessions.

That keeps every session at the base structure’s eleven working sets. The 25-rep threshold for weighted T3 movements is tracked automatically; unassisted pull-ups use a separate hitPR rep progression and are only a suitable direct 3×15+ starting point if you can complete all base reps under control. Extra T3 movements are not scheduled. If you decide to add them later, introduce them gradually using the criteria in this guide.

Conclusion

The safe default decision is simple: start with the one pulling exercise from the template and progress it through the final set until you hit the 25-rep threshold.

Further T3 exercises do not become worthwhile because there is time left over. They become worthwhile when the base program is running stably, a specific job is still open, and you can absorb the extra volume step by step.

Sources

• Cody Lefever (2016): GZCL Applications & Adaptations, sections “T3 Accessories, Structure and Progression”, “GZCLP T3 Progression” and “Transferring to and Going from Novice to Intermediate on GZCL”. Primary source for T3 selection, the 25-rep rule, load management and gradual expansion.
• American College of Sports Medicine (2026): Resistance Training Prescription for Muscle Function, Hypertrophy, and Physical Performance in Healthy Adults: An Overview of Reviews. Reference for situating training volume, loading and individually adjusted program design.