Exercise Redundancy: Why 3 Near-Identical Exercises Waste Your Energy

Exercise redundancy is what happens when you stack exercises that load the same muscle at the same angle, along the same path, with the hardest point in the same part of the rep. You pay the fatigue of three exercises, but the later sets are done tired and keep hitting the same part of the muscle in the same way. This article sits inside our guide to exercise selection and biomechanics, and it gives you a way to audit your split and swap clones for exercises that earn their place.

Picture a common chest day. Barbell bench, dumbbell flat press, machine flat press. Nine hard sets. You walk out wrecked, and the effort is real. The question is whether all of it is buying something the first exercise did not already give you.

What is exercise redundancy in a workout?

An exercise is redundant when a different exercise in the same session already delivers what it would deliver. Not “uses similar equipment”. Delivers the same stimulus.

Three things define a stimulus for a muscle:

• Joint angle and path. A flat press and a flat dumbbell press both move the upper arm in roughly the same plane relative to your torso.
• Where the load peaks. Gravity-based loads like a barbell or dumbbell are generally hardest at a similar point in the press. A cable or a machine cam can move that point.
• Which muscles limit the set. If your triceps give out first on all three presses, the chest never gets a fresh signal on exercises two and three.

When all three match, you are doing the same exercise with different handles. That is redundancy.

Why do overlapping exercises add fatigue instead of growth?

Short answer: fatigue keeps building with every hard set, while later sets of an identical movement are done tired and add no new angle or position. Those sets still count as volume. They are just a less efficient way to spend it.

Think of exercise number three on that chest day. Your triceps and front delts are already cooked from the first six sets. You press less weight or stop a rep or two earlier, so the chest gets a lower quality set than the first one did. You paid full recovery cost and received a discounted stimulus.

There is no trial that directly tests “three flat presses versus one flat press and two different exercises”. So be careful what you take from this. What exists is indirect support:

• A 2022 systematic review of exercise variation covered eight studies and 241 young men. It concluded that some systematic variation seems to enhance regional hypertrophy and maximize dynamic strength, while excessive, random variation may compromise gains. The authors added that using different exercises that provide a redundant stimulus may actually hinder adaptation (Kassiano et al., 2022).
• A 2019 review on counting sets argued that multi-joint lifts do not necessarily train every involved muscle equally. For example, during the leg press and squat, hamstring activation is markedly lower than quadriceps activation (Schoenfeld et al., 2019). That is a reminder that “a set of squats” is not a set for every leg muscle.

That is limited evidence from small trials, mostly young men, with short follow-ups. It supports a sensible rule. It does not prove an exact cost of redundancy.

Is more volume not always better? How redundancy fits with set counts

Fair objection. If more weekly sets generally means more growth, why not pile on the presses?

Because volume and variety are two different dials. A meta-regression of 15 studies found that each additional weekly set was associated with a 0.37% larger gain in muscle size, and a graded dose-response relationship overall (Schoenfeld et al., 2017). So sets matter. Nobody should read redundancy as “do fewer sets”.

The practical point is where those sets go:

• Same 9 sets, one stimulus: you concentrate fatigue on the same joints and tissues, and the last few sets are low quality.
• Same 9 sets, three different stimuli: you spread joint stress, keep each set fresher, and cover more of the muscle’s job.

If you want a longer look at how many sets to run, our guide on volume, frequency and hypertrophy covers it. For this article, treat your set budget as fixed and ask where to spend it.

What counts as a genuinely different exercise?

Equipment is the weakest difference. Barbell versus dumbbell versus Smith machine can change stability demands and comfort, but the muscle is often loaded much the same way. If you want the equipment angle, see our piece on free weights, cables and machines.

Stronger differences are these:

1. Joint angle. Flat versus incline press changes the line of pull on the chest. See incline versus flat bench.
2. Path. A press moves the hands in a pushing arc. A fly moves them in a hugging arc around the shoulder with the elbow roughly fixed.
3. Where the resistance peaks. Cables and cam machines can be hard in positions where a dumbbell is easy. We cover this in matching resistance profiles to strength curves.
4. Muscle length. Some exercises load the muscle hardest when it is stretched, others when it is shortened.

Regional growth research shows why this matters. In one randomized trial, two groups with equal volume and intensity trained either Smith machine squats or leg extensions. All three measured regions of the rectus femoris grew in the leg extension group, while only the central region of the vastus lateralis grew in the squat group (Zabaleta-Korta et al., 2021). Different exercise, different pattern of growth, even at matched volume.

A second study from the same lab compared two curls in 38 recreationally trained women over 9 weeks. The preacher curl, which loads the elbow flexors at long muscle lengths, grew the distal region (thickness 2.7 cm to 2.94 cm), while no region grew in the incline curl group. The authors found no significant difference between groups or regions in the statistical comparison, so the signal is suggestive rather than decisive (Zabaleta-Korta et al., 2023).

How to audit your split in 10 minutes

Take one muscle, one session, and run each pair of exercises through three questions. Is the joint angle and path the same? Is it hardest at the same point of the rep? Does the same limiting muscle fail first? Three yeses means redundant.

Then decide:

• Merge. Keep the exercise you can progress and feel most, add the sets from the clone to it.
• Replace. Swap the clone for a version that changes the angle or the load peak.
• Cut. If time is the problem, drop the clone. Try to move its sets elsewhere in the week, because weekly volume still matters.

A redundant chest day versus a cleaned up version

The brief example: barbell bench, dumbbell flat press, machine flat press.

Slot	Redundant version	Cleaned up version	What changed
1	Barbell flat bench, 3 sets	Barbell or dumbbell flat press, 3-4 sets	Heavy compound anchor, kept
2	Dumbbell flat press, 3 sets	Incline dumbbell press, 3 sets	New angle, more upper chest
3	Machine flat press, 3 sets	Cable fly or pec deck, 3 sets	New path and load peak

Same set count, similar time. The second layout asks the chest three different questions. If you want to build the rest of the session around this, see chest workout architecture.

Are isolation exercises redundant with compound lifts?

Not by default. A press loads chest, front delts and triceps together, so the weakest link may stop the set before the chest is fully worked. An isolation exercise can then top up a muscle that did not get fully worked.

The research is mixed here. In a trial of 20 trained men over 8 weeks, adding single-joint exercises to a multi-joint program produced no significant extra strength or size gains compared with multi-joint work alone, though the group with single-joint work had numerically larger arm muscle circumference gains (3.17% versus 1.33%) (de Franca et al., 2015). With 10 per group and only 8 weeks, that trial was small and may not detect modest differences.

The cautious takeaway: isolation work is not a duplicate of compounds, but it is optional. Keep it if it fills a gap you can name (a stretched position, a muscle that lags) and you have recovery to spare. For more, see compound versus isolation exercises.

Does changing exercises constantly help? The muscle confusion problem

The opposite mistake is just as common. Someone reads that variety matters and rotates five new exercises every week.

The same 2022 review notes that excessive rotation, meaning frequent changes, may actually hinder adaptation (Kassiano et al., 2022). It makes practical sense. Progressive overload needs repeated exposures, and you cannot tell if you got stronger on an exercise you did once.

A workable approach:

• Keep your main lifts for a block of 8-12 weeks.
• Rotate accessories only when they stop progressing or hurt.
• When you rotate, change something meaningful (angle, path, load peak), not just the handle.

Also remember that range of motion matters for how well each exercise grows muscle. A review of range of motion studies suggests full ROM training favors lower body hypertrophy, while upper-limb results were limited and conflicting (Schoenfeld and Grgic, 2020). A narrative review recommends emphasizing long muscle lengths (Androulakis Korakakis et al., 2023). Whichever exercise you keep, do it properly.

How to build non-redundant sessions on an Indian budget and schedule

Most of what matters here costs nothing. A few specifics:

• Limited equipment. Some gyms have two or three press machines that do much the same job. Pick one, then use your free time for an incline dumbbell press and a cable or pec deck movement.
• Short sessions. If you can train for only 45-60 minutes, cut the third clone first. A tight session with 2-3 different exercises beats a long one done tired.
• Hot weather. Long sessions in a warm, humid gym drain you faster. Fewer, more different exercises keeps quality up late in the session.
• Food. Plenty of dal, curd, paneer, eggs or soya help recovery from the sets you do keep. Our protein calculator gives a daily target for your body weight.

For a ready-made structure, our push day plan avoids stacking clones.

Where this advice has limits

Be honest about the gaps:

• No study directly compares “three clone exercises” with “three different exercises” at equal sets.
• Most trials are 8-12 weeks, in young men or recreationally trained participants.
• Hypertrophy measured at one site does not capture the whole muscle.
• Beginners can grow on almost anything, so redundancy matters less early on.

If one exercise suits your body and you are progressing on it, keep it. The audit is a tool for cluttered routines, not a reason to ditch something that works. See also stimulus-to-fatigue ratio in exercise selection for how to judge which exercises give the most return for the tiredness.

When to see a doctor

Training tiredness should ease with rest, food and sleep. If you have chest pain, shortness of breath out of proportion to effort, dizziness, fainting, unexplained weight loss, or exhaustion that does not lift after a few easy days, see a doctor. This article cannot tell you whether your fatigue is a programming issue or a health one.

The short version

Keep two or three exercises per muscle per session, make sure they differ in angle, path or load peak, and spend your sets there. Use the three question test, merge or swap the clones, and hold your core lifts long enough to progress them.