Here's a pattern that plays out in gyms everywhere: someone hits a plateau. Progress stops. They feel like they're not doing enough. So they add a set here, an extra session there, maybe throw in some additional isolation work at the end of an already long session.
For a while, this might feel productive. More work feels like more effort, and more effort feels like more progress. But often it isn't — and understanding why requires looking at what actually drives adaptation.
The Stimulus-Fatigue Relationship
Every training session creates two things simultaneously: a stimulus for adaptation and a fatigue response. The goal of any well-designed programme is to maximise the former while managing the latter.
The problem with simply adding volume when progress stalls is that it almost always increases fatigue proportionally — and often disproportionately. You're not just adding more signal; you're also adding more noise. At some point, the fatigue from the extra work starts to mask the fitness gains underneath it, and you end up working harder for worse results.
This is what Zatsiorsky and Kraemer described as the stimulus-fatigue-recovery-adaptation model: the adaptation only becomes visible once the fatigue clears. If you're always generating more fatigue than you can recover from, you'll rarely see the adaptations you're working towards.
Untrained vs Advanced Lifters: A Critical Distinction
One of the most important things the research makes clear is that training experience fundamentally changes how your body responds to volume.
Untrained individuals — broadly, anyone in their first year or two of structured training — can respond positively to almost any training stimulus. The dose-response relationship is relatively flat at lower levels of experience. You can give a beginner 3 sets per session or 6 sets per session and you'll likely see similar rates of progress, because the threshold for adaptation is low and the ceiling for response is high.
For more advanced lifters, this changes significantly. The body has adapted to previous training, the low-hanging fruit of neuromuscular adaptation has already been captured, and eliciting further progress requires more specific stimuli — not simply more volume. Schoenfeld et al. (2017) demonstrated that advanced trainees require greater specificity in programming to continue driving hypertrophy, and that indiscriminate volume increases often lead to plateaus rather than breaking them.
What Is "Junk Volume"?
Junk volume is a term for training work that generates fatigue without providing a meaningful additional stimulus for adaptation. It's not necessarily easy work — it can feel hard — but it's work your body has already adapted to at a level that doesn't drive further progress.
Common examples include:
- Additional sets performed far from failure, below the threshold needed to recruit high-threshold motor units
- Isolation exercises added on top of an already sufficient compound loading stimulus
- Extra sessions that duplicate the training stress of existing sessions without adding a novel quality
- Volume increases not supported by adequate recovery (sleep, nutrition, stress management)
The minimum effective dose concept — the smallest stimulus that drives adaptation — is a useful reframe here. Your goal isn't to do as much as possible; it's to do exactly as much as is needed, then recover and repeat.
What to Do Instead
If you've hit a plateau, the answer is almost never to simply add volume. Before you add a single set, ask:
1. Is the intensity appropriate? Are you training close enough to failure to recruit the motor units necessary for adaptation? Many lifters chronically undertrain in terms of proximity to failure while overtraining in terms of volume.
2. Is there sufficient specificity? Are the qualities you're training actually aligned with your goal? Strength and hypertrophy require different emphases. General fitness and athletic performance require different qualities again.
3. Is recovery adequate? Sleep is the single most powerful recovery tool available. Poor sleep directly impairs protein synthesis, reduces anabolic hormone output, and undermines the adaptation process regardless of how well the training is designed.
4. Is there a periodisation issue? Sustained progress over months and years requires planned variation in loading. If you've been running the same programme for six months, the plateau may be a signal that accommodation has occurred — not that you need more of the same.
The Takeaway
More volume is a blunt instrument. It works well for untrained lifters precisely because almost anything does. For anyone with meaningful training experience, the question isn't how much — it's what, at what intensity, and with what recovery structure.
The athletes who make consistent, long-term progress aren't the ones doing the most. They're the ones doing the right things, at the right times, with enough recovery to actually adapt.
If you're stuck and want a programme built around your specific situation rather than the assumption that more is always better, book a free consultation and we can work through it together.