Mass phase: Janar Rückenberg’s training plan

A mass phase is a time when training has to be heavy, consistent and flexible enough all at once. Here is Janar Rückenberg’s 12-week plan, divided into 3 phases: strength first, then strength + muscle mass, and finally classic mass-building work.

Why does a mass phase need phases?

The competitions are over and a familiar feeling kicks in: now you want to build muscle again. But simply doing more training isn’t always better. Steady, progressive, effective development usually comes when the weights, reps, sets and rest all move with a clear purpose.

Janar Rückenberg’s idea is simple: the whole cycle lasts 12 weeks, followed by 1 week of active rest. In real life that active rest tends to get skipped, because the urge to start again right away is strong. Honestly, many people will recognize this. Still, recovery matters here just as much as the squat, deadlift or bench press.

The plan doesn’t follow the days of the week strictly. It runs on a rolling basis. If recovery is good, you move on. If fatigue builds up, you need to take more rest. When necessary, you can take 2 rest days in a row, or take 2-3 days off at the end of each phase.

The 12-week mass phase: how the phases work

Roughly, the goals of the phases are as follows: Phase 1 – mainly strength, Phase 2 – strength + muscle mass, Phase 3 – muscle mass. In the original plan each phase lasts 4 weeks, but that isn’t set in stone. If progress is good, the first period can be extended to, say, 6 or 8 weeks. On the other hand, in 2 weeks or less many people simply don’t have time to settle into a phase.

The whole 12-week cycle usually starts with an adaptation phase of about 2-4 weeks. Its purpose is to prepare the muscles and joints. The rep count goes down while the resistance goes up. Jumping straight into very low reps and heavy weights would be a bit like starting a workout without a warm-up.

Phase I: the first 4 weeks

The first phase lasts four weeks and the main goal is strength gain. For large muscle groups, the rep count is 3-6. For arms, 4-7 works better according to Janar, since 3 reps would be too few for Janar personally. Large muscles get two, at most three exercises, and small muscles get 1-2 exercises. The main emphasis is on compound exercises.

10-12 sets for a large muscle.
6-8 sets for a smaller muscle.
For each muscle you can also include 2-3 sets with a higher rep count.

For example, a chest workout could look like this: 1. Bench press 6x, 6x, 4x, 3x, 3x. 2. Incline dumbbell press 6x, 6x, 5x, 8-10x. 3. Flat-bench fly 12x, 10x. Why do those higher-rep sets stay in? If you do only strength reps for 4 weeks straight, mass can suffer.

Phase I runs on a 4:1:2:1:2:1:4 etc. system. That means 4 workouts, 1 rest day, 2 workouts, 1 rest day, 2 workouts, 1 rest day and then 4 workouts again. When you have more energy, you can occasionally use a 4:1:4:1 etc. scheme too, but training like that all the time can bring on overtraining quickly.

PHASE I - TRAINING PLAN FOR THE FIRST 4 WEEKS:
Day 1 - Thighs, lats.
Day 2 - Chest, front delts.
Day 3 - Deadlift, traps, rear delts.
Day 4 - Triceps, biceps.
Day 5 - rest
Day 6 - Thighs, lats.
Day 7 - Chest, front delts.
Day 8 - rest
Day 9 - Deadlift, traps, rear delts.
Day 10 - Triceps, biceps.
Day 11 - rest
Day 12 - Thighs, lats.
Day 13 - Chest, front delts.
Day 14 - Deadlift, traps, rear delts.
Day 15 - Triceps, biceps.
Day 16 - rest
Day 17 - Thighs, lats.
Day 18 - Chest, front delts.
Day 19 - rest
Day 20 - Deadlift, traps, rear delts.
Day 21 - Triceps, biceps.
Day 22 - rest
Day 23 - Thighs, lats.
Day 24 - Chest, front delts.
Day 25 - Deadlift, traps, rear delts.
Day 26 - Triceps, biceps.
Day 27 - rest
Day 28 - rest

Among the special methods, the first phase includes cheat reps, forced reps, burnouts, drop sets and negative reps. Janar doesn’t use supersets, tri-sets or giant sets in this phase. Abs and calves are trained every two days.

Phase II: strength + mass, weeks 5-8

The goal of the second phase is muscle mass, but the 5-8 rep range keeps your strength numbers working too. A large muscle group gets 10-12 sets, a small muscle group 5-8 sets. A large muscle group usually gets 3 exercises, for example 2 compound + 1 isolation. For a small muscle group, 2 exercises suit, either 2 compound or 1 compound + 1 isolation.

In this phase the intensity techniques from the first phase stay, and supersets and tri-sets are added. The plan runs on a 2:1:3:1 etc. system. Arms are trained 2 x per microcycle, meaning more often than usual, since the aim is to prioritize arm development.

PHASE II - STRENGTH + MASS, WEEKS 5-8:
Day 1 - Deadlift, traps, rear delts
Day 2 - Biceps, triceps
Day 3 - rest
Day 4 - Thighs, calves
Day 5 - Lats, biceps (light)
Day 6 - Chest, front delts, triceps (light)
Day 7 - rest
Day 8 - Deadlift, traps, rear delts
Day 9 - Biceps, triceps
Day 10 - rest
Day 11 - Thighs, calves
Day 12 - Lats, biceps (light)
Day 13 - Chest, front delts, triceps (light)
Day 14 - rest
Day 15 - Deadlift, traps, rear delts
Day 16 - Biceps, triceps
Day 17 - rest
Day 18 - Thighs, calves
Day 19 - Lats, biceps (light)
Day 20 - Chest, front delts, triceps (light)
Day 21 - rest
Day 22 - Deadlift, traps, rear delts
Day 23 - Biceps, triceps
Day 24 - rest
Day 25 - Thighs, calves
Day 26 - Lats, biceps (light)
Day 27 - Chest, front delts, triceps (light)
Day 28 - rest

The deadlift, traps and rear delts get their own day for a reason. The lats are a large muscle, and working them properly already takes 10-12 sets. If you also put rows and traps on the same day, the workout drags on and your focus scatters. The rear delts also work hard alongside the traps, rhomboids and inner back.

On the dedicated arm day, Janar does 6-8 sets each for triceps and biceps. A lighter day means 3-5 sets, usually 3-4 sets. Sometimes a couple of supersets are enough. It all depends on how well recovery from the previous arm day has gone.

To maintain strength, Janar sometimes uses reps below five on the first compound exercise: for example 2×3, 2×4 or 5x, 4x, 3x. Then come a couple more sets of 7-8 reps. There are only 2-3 sets in the strength rep range per muscle, and most of the work falls in the 6-8 range. At the end, the last exercise may get 1-2 sets of 10 or 12 reps.

As an example, a leg workout in this phase might look like this: 1. Squat – 4x, 5x, 8x, 8x. 2. Leg press 8x, 8x, 10x, 12x, sometimes with the last set lasting 2 min. at light resistance, usually 40-50x. 3. Lying leg curl 10x, 8x, 8x, 6x.

The general rep distribution doesn’t apply to abs and calves in quite the same form. There Janar uses ranges of 8-15 x, 15-25 x and over 25 x, even up to 100 x. Supersets and tri-sets are added on top. Janar usually does 4-6 sets for abs and calves and varies them according to progress.

Phase III: mass, weeks 9-12

The third phase is the most direct hypertrophy phase, in other words a pure mass phase. The rep count is 12 – 8. Volume is higher, because each workout covers one muscle at a time and you can focus more precisely. There is also more energy to go around, because the split doesn’t squeeze several large areas into a single workout.

Large muscle: 10 – 15 sets.
Small muscle: 7 – 10 sets.
3-4 exercises for both large and small muscles.
Exercise selection can be 2 compound + 2 isolation or 3 compound + 1 isolation.

3. PHASE III - MASS, WEEKS 9-12!
Day 1 - LEGS
Day 2 - TRICEPS
Day 3 - BICEPS
Day 4 - REST
Day 5 - CHEST
Day 6 - BACK
Day 7 - SHOULDERS
Day 8 - LEGS
Day 9 - TRICEPS
Day 10 - BICEPS
Day 11 - REST
Day 12 - CHEST
Day 13 - BACK
Day 14 - SHOULDERS
Day 15 - LEGS
Day 16 - TRICEPS
Day 17 - BICEPS
Day 18 - REST
Day 19 - CHEST
Day 20 - BACK
Day 21 - SHOULDERS
Day 22 - LEGS
Day 23 - TRICEPS
Day 24 - BICEPS
Day 25 - REST
Day 26 - CHEST
Day 27 - BACK
Day 28 - SHOULDERS

In this phase you can use all the intensification techniques mentioned earlier and, if needed, other methods too. If you get bored or a muscle needs a fresh stimulus, you can run one microcycle mid-phase with only supersets or in the form of German volume training, 10×10. A simple truth: a program works better when it gives you a framework, not a prison.

How do you put the mass phase into practice?

Exercise selection is up to you, but the big three – the deadlift, squat and bench press – carry the main load in the program. That doesn’t mean every chest workout has to start with the bench press for all 12 weeks. Sometimes you can start with dumbbells, sometimes on an incline bench, sometimes with a barbell. It all depends on which area of the muscle you want to bring up.

You should swap and change exercises. The same goes for rest. As a rule, Janar doesn’t rest 2 days in a row in any phase, but when you’re fatigued it’s not only allowed but necessary. If your body doesn’t recover, the next hard workout won’t make you better.

Another important point: using only a strength phase, i.e. 1-6 reps, may not be the best solution for a bodybuilder. An intensive bodybuilding phase with 3-6 reps also builds strength, but keeps the focus where it should be. The goal is MUSCLE MASS.

Practical tips for the mass phase

Don’t change the plan after every workout. Give a phase time, at least 3 or 4 weeks.
If recovery gets worse, add a rest day before you start blaming the exercises.
Keep your technique in the heavy compound exercises. The deadlift, squat and bench press give a lot, but they also take a lot.
Use intensification techniques in moderation. Cheat reps, forced reps and drop sets don’t have to be in every exercise.
You can train abs and calves every 2 days, but there too you need to vary the training load.
If arms are a priority, you can train biceps and triceps more often, but 6-8 sets on a hard day and 3-5 sets on a lighter day is already enough work.

Why did Janar write about this at all? To get feedback and give others some ideas to work with. Every man adjusts the final program to fit their own quirks and needs. That is the strength of this plan: the framework is clear, but there is room within it to make decisions based on recovery, energy and weak muscle groups.

FAQ: mass phase and training split

Does it have to be 12 weeks long?

No. Janar’s original cycle is 12 + 1 weeks, where week 13 is active rest. If your recovery is good, you can adjust the cycle, but after a long period a rest week usually makes sense.

Does every phase have to last exactly 4 weeks?

No. 4 weeks works well for Janar, but if progress is good, the first phase can also last 6 or 8 weeks. Anything under 3 weeks may be too short, because your body doesn’t have time to settle into the rhythm.

Is a mass phase suitable for a beginner?

This plan is better suited to someone who already knows the basic exercises and can judge their own recovery. Before taking on such a frequent, high-volume split, a beginner should first learn to squat, pull and press properly.

Author: Janar Rückenberg

Source: WHO – physical activity.

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