GZCLP: three tiers, progression and what happens when load stalls
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Who it is for and how sessions rotate
Lefever presents GZCLP for new lifters or people moving from another linear progression. The original rotates four workouts across three sessions per week: the fourth workout rolls into the next week. It does not compress four workouts into three days. Squat, bench press, deadlift and overhead press rotate between primary T1 and secondary T2 roles; the initial T3 movements are back exercises.1
Three tiers within a session
| Tier | Role | Starting structure, sets × reps |
|---|---|---|
| T1 | Main lift, heavier load | 5 × 3+, at least 15 total reps |
| T2 | Another main lift, lighter load and more volume | 3 × 10, 30 total reps |
| T3 | Accessory, initially pulldowns or rows | 3 × 15+, last set extended |
Notation matters: the author writes reps × sets. His “3 × 5+” means five sets of three, not three sets of five. Tables on this page always use sets × reps. The “+” applies only to the last set: extra reps with a reserve, not true failure. Lefever specifies 1–2 reps in reserve and a cap of ten reps on the T1 AMRAP.1
T1: load rises, minimum volume falls
| Stage | Sets × reps | Minimum volume |
|---|---|---|
| 1 | 5 × 3+ | 15 |
| 2 | 6 × 2+ | 12 |
| 3 | 10 × 1+ | 10 |
Load stays constant across sets within the workout. It increases the next time that lift appears as T1 while the minimum volume is achieved with the intended reserve. If it is missed, the next stage begins at the same weight, not a heavier one. The author gives approximate increments of 5–10 lb (about 2.3–4.5 kg), not a mandatory identical increase for every person or lift.1
After the ten singles can no longer be completed, the source specifies 2–3 days of rest, a new 5RM test and a restart at 85% of that 5RM. This is not 85% of a one-rep max. Testing requires suitable technique and conditions; this describes a program rule, not an invitation to test unprepared.
T2 and T3 use different rules
T2 moves from 3 × 10 to 3 × 8, then 3 × 6, when the minimums of 30 and 24 reps are missed. After the 18-rep minimum is missed, it returns to 3 × 10 at a slightly higher starting load than the previous cycle. Lefever caps the increase in that starting point at 20 lb (about 9 kg). This is not a 9 kg increase every workout, nor a universal deload percentage.1
For T3, the final set is the marker: once it reaches 25 reps, load increases modestly. All three sets do not have to reach 25. The ten-rep cap on the T1 AMRAP does not apply to T3.
Rest between sets
The Fitness Wiki explainer gives 3–5 minutes for T1, 2–3 for T2 and 1–1.5 for T3. These intervals belong to that secondary guide and are kept separate from the rules read in the author’s article.2
Illustrative example, not a personal routine
The author’s first workout pairs a T1 squat with a T2 bench press and T3 lat pulldown. Suppose the T1 squat uses 40 kg: four sets of three and a final set of five give 17 total reps. The first 15 are the stage minimum; two extra reps do not turn it into five sets of five. All sets use 40 kg.
If a later exposure misses its minimum, the described next step is six sets of two at the same load, with the last set “+”. A hypothetical new 5RM of 60 kg would instead give 60 × 0.85 = 51 kg for the restart; the actual load also depends on available plates. These numbers explain the rules, not how much the reader should lift.
Limits and endurance training
- The sources consulted describe a strength program and its author’s experience, not a controlled comparison demonstrating superiority.
- Lefever warns that volume and effort may require lower starting loads and more attention to recovery. When more recovery is needed, he suggests leaving more reps in reserve.
- The sources consulted do not assess a specific GZCLP adaptation for runners, cyclists or swimmers. Adding all its sessions to endurance training is not a recommendation of this page.
- GZCL is the broader framework; GZCLP is a beginner progression within it. P-Zero 2025 should not be merged with the version described here.
Sources
- Cody Lefever, GZCL Applications & Adaptations, 5 February 2016, GZCLP section. Author source.
- The Fitness Wiki: GZCLP. Secondary explainer, rest intervals and sets × reps notation.
- Cody Lefever, P-Zero, 19 May 2025. Introduction. Visible material consulted to distinguish versions; the full manual is not the source for this page.
Sources consulted on 29 October 2026. Program description, not an individual prescription.