Why More Isn't Always Better: Understanding Training Volume

"How many sets should I be doing" is one of the most-searched questions in strength training, and it reflects a reasonable assumption: if some volume builds muscle, more volume should build more. That assumption isn't entirely wrong — it's just incomplete. The dose-response research on training volume does show a real, positive relationship between weekly volume and hypertrophy, but that relationship has a shape, not a straight line, and understanding the shape is more useful than chasing an ever-higher number of weekly sets.

The practical question worth asking isn't "what's the maximum volume I can survive," but "what's my effective dose" — the amount of training that reliably produces adaptation without quietly eating into the recovery capacity that adaptation actually depends on. That question has a research-backed answer, even if the answer looks less like a single number and more like a personalized range.

What the Dose-Response Research Actually Found

The foundational study in this area is a 2017 meta-analysis by Schoenfeld, Ogborn, and Krieger, published in the Journal of Sports Sciences, which pooled data across multiple trials examining the relationship between weekly resistance training volume, measured in sets per muscle group, and increases in muscle mass. The analysis found a clear dose-response trend: higher weekly volumes, roughly 10 or more sets per muscle group, were associated with significantly greater hypertrophy than lower volumes. This finding became one of the most influential in modern strength training programming, and it's the origin of the now-common recommendation to aim for at least 10 weekly sets per muscle group for hypertrophy-focused training.

Critically, though, this doesn't mean the relationship keeps climbing indefinitely, and the researchers themselves were careful not to claim that. A dose-response relationship with diminishing returns at higher doses is an entirely different, and much more realistic, model than "more is linearly better forever" — and it's the model this research actually supports. The practical distinction matters: a linear relationship would justify chasing an ever-higher set count, while a diminishing-returns relationship justifies finding the point where the curve flattens and training consistently there instead.

The Newer Research: Individual Variation Matters More Than a Fixed Number

A 2026 meta-regression by Pelland, Remmert, Robinson, Hinson, and Zourdos, published in Sports Medicine, revisited this question with a larger, more recent body of trials and a statistical approach designed specifically to explore how the volume-hypertrophy relationship varies rather than just estimating a single average. The updated analysis confirmed the broad direction of the earlier finding — more volume, up to a point, is generally associated with more growth — but also highlighted meaningfully wide individual variation in exactly where the curve flattens or turns negative. In practice, this means a training volume that continues producing returns for one lifter may already be past the productive range for another, even with broadly similar training experience.

This is a genuinely important update to the simpler "10+ sets" heuristic that circulated widely after the original 2017 study. The number is a reasonable starting point, not a target to chase upward indefinitely on the assumption that whatever worked at 10 sets will work even better at 20.

Why More Volume Isn't Free

The reason volume has a ceiling at all comes down to recovery capacity. Every set performed close to failure creates a stimulus that requires recovery before it converts into adaptation — more sets means more total stimulus, but also more total fatigue and more total recovery demand. Past a certain point, additional sets are being added faster than the body can process them into growth, and the marginal sets stop contributing meaningfully to the outcome while still adding to the fatigue and injury-risk side of the ledger. This is the same underlying logic that governs overtraining more broadly: the relevant variable was never the size of the training stimulus in isolation, but the stimulus relative to what can actually be recovered from and adapted to.

This also explains why simply copying a high-volume program from an advanced lifter or a professional athlete is a common and costly mistake for less experienced trainees. Training history itself expands recoverable capacity over time — an athlete who has spent years building the physiological infrastructure to recover from high volumes is working with a genuinely different ceiling than someone several months into structured training, even if their goals and exercise selection look identical on paper. Sleep quality, life stress, nutrition, and age all factor into that same recoverable-capacity equation as well, which is a large part of why two people following an identical program can have such different experiences of it — one thriving on a volume that leaves the other stalling or increasingly fatigued.

Volume isn't the goal — adaptation is. More sets only count if you can actually recover from them.

Finding Your Own Effective Dose

Given the genuine individual variation the newer research highlights, the most defensible practical approach is to treat the published ranges as a starting point to personalize rather than a target to hit precisely. A sensible starting range, consistent with both the original and updated meta-analytic research, sits somewhere around 10-20 weekly sets per muscle group for most trained individuals pursuing hypertrophy, with less experienced lifters typically doing well nearer the lower end of that range and needing to earn their way up rather than starting there.

From that starting point, the signal that matters most is trend over several weeks, not any single session: are strength and performance in your key lifts still trending upward at the current volume, is recovery between sessions holding up, and is motivation to train still intact rather than eroding? A volume that produces stalling performance, persistent soreness that doesn't resolve between sessions, or a steadily dropping desire to train is past that individual's effective dose regardless of what the general research range suggests — and a volume that's producing steady progress with good recovery is working, regardless of whether it matches someone else's program.

Volume Isn't the Only Lever, Either

It's also worth remembering that total weekly sets is one variable among several — intensity, proximity to failure, exercise selection, and frequency all interact with volume rather than existing independently of it. A lifter training closer to failure on average needs less total volume to produce the same stimulus as one training with more reps in reserve, which is part of why the "right" volume for any individual also depends on decisions covered elsewhere in program design, not volume alone in isolation.

Volume Should Change Across a Training Cycle, Not Stay Fixed

One of the more common volume mistakes isn't picking the wrong weekly number — it's picking a number and holding it constant indefinitely. Well-designed training programs generally build volume progressively across a training block, starting lower and increasing week to week as the body adapts, before deliberately reducing volume for a period — a deload — to allow accumulated fatigue to resolve before the next block begins. This isn't a concession to weakness; it's a recognition that fatigue accumulates faster than the underlying fitness adaptations it's driving, and that periodically clearing that fatigue is what allows the next block to be trained at a genuinely higher volume than would otherwise be sustainable.

Skipping planned volume reduction, on the assumption that any week of reduced training is a week of lost progress, is a common way that a genuinely appropriate starting volume gradually turns into an excessive one — not because the number changed, but because the accumulated fatigue underneath it kept climbing without ever being allowed to resolve. The research on overtraining syndrome describes essentially the same mechanism at a more extreme level: it's rarely one specific week of high volume that causes a problem, but volume sustained without adequate periodic reduction over months.

In practice, this means the useful question isn't just "what's my weekly volume" but "what's my weekly volume doing across the last four to six weeks" — is it building deliberately toward a planned reduction, or has it simply been high for an extended stretch with no planned lower week in sight? The second pattern is a common, quiet way that a defensible volume on paper becomes a genuine problem in practice.

FAQ

How many sets per muscle group per week should I be doing?

Meta-analytic research by Schoenfeld, Ogborn, and Krieger (2017) found that roughly 10 or more weekly sets per muscle group tended to produce greater hypertrophy than fewer than 10, but a more recent 2026 meta-regression by Pelland and colleagues found substantial individual variation in where returns start to flatten, meaning the "ideal" number is a starting range to personalize, not a universal target.

Is there a point where more training volume actually hurts progress?

Yes. Beyond an individual's recoverable capacity, additional volume increases fatigue and injury risk without a proportional increase in adaptation, and can reduce training quality across a week enough to slow progress rather than speed it — a pattern consistent with the broader overtraining and recovery-capacity research.

How do I find my own effective training volume?

Start within the well-supported general range from the research, then track whether performance, recovery, and motivation are trending up or down over several weeks at that volume. If a rest day still leaves you feeling flat or your lifts are stalling despite consistent effort, that's a more reliable signal to reduce volume than any fixed number from a study.

Sources

• Schoenfeld, B. J., Ogborn, D., & Krieger, J. W. (2017). Dose-Response Relationship Between Weekly Resistance Training Volume and Increases in Muscle Mass: A Systematic Review and Meta-Analysis. Journal of Sports Sciences, 35(11), 1073-1082.
• Pelland, J. C., Remmert, J. F., Robinson, Z. P., Hinson, S. R., & Zourdos, M. C. (2026). The Resistance Training Dose Response: Meta-Regressions Exploring the Effects of Weekly Volume and Frequency on Muscle Hypertrophy and Strength Gains. Sports Medicine, 56(2), 481-505.