Understanding Training Volume
Before diving into the complex science, let's define our terms. 'Training volume' is essentially the total amount of work you do in a workout or over a week. The simplest way to track it is by counting the number of 'hard sets' you perform for a specific
muscle group. A hard set is one taken close to muscular failure, where you only have a few repetitions left in the tank. For years, a debate has raged in fitness circles: do you need high volume, like the marathon sessions of professional bodybuilders, or can you get great results with a more minimalist approach?
The Law of Diminishing Returns
The core of the new thinking revolves around an old concept: the law of diminishing returns. This principle states that as you invest more in something, the payoff you get from each additional investment will eventually decrease. In strength training, this means the first few sets you do for a muscle provide the biggest stimulus for growth. As you keep adding more and more sets, each one provides progressively less benefit while creating more and more fatigue. Eventually, you reach a point where the extra work isn't just less effective; it can actually be counterproductive by hindering your ability to recover.
What the Science Says: The Sweet Spot
So, what does the latest research pinpoint as the optimal range? A growing consensus, supported by numerous studies and meta-analyses, suggests a dose-response relationship between volume and muscle growth. More volume is generally better, but only up to a certain point. For most people looking to build muscle (a process called hypertrophy), the sweet spot appears to be between 10 to 20 hard sets per muscle group, per week. Below 10 sets, you might still see gains, especially if you are a beginner, but you are likely leaving potential growth on the table. Above 20 sets, the benefits begin to plateau significantly for most lifters.
The Danger of 'Junk Volume'
Training far beyond this 10-20 set range often leads to what experts call “junk volume.” This is any training that adds to your fatigue without providing a meaningful additional stimulus for muscle growth. Think of it as empty calories for your muscles. Doing 30 or 40 sets for your chest in a single day might feel heroic, but research suggests the muscle growth signal is already maxed out long before you finish. All those extra sets primarily serve to increase muscle damage, prolong recovery time, and elevate your risk of overtraining and injury, without delivering better results. It's wasted effort that could be better spent on recovery or training another muscle group.
Making it Practical For You
The key takeaway is to shift your focus from session volume to weekly volume. Instead of trying to annihilate a muscle group in one workout, spread your 10-20 sets across two or three sessions during the week. For example, instead of a 20-set chest day on Monday, try doing 10 sets on Monday and another 10 on Thursday. This approach allows for higher quality sets in each workout, as you are less fatigued, and provides the muscle with multiple growth signals throughout the week. It’s also crucial to remember that this is a guideline, not a rigid rule. Training age, genetics, nutrition, sleep, and life stress all affect your recovery capacity. An advanced lifter might benefit from volumes closer to 20-25 sets, while a beginner will see fantastic progress in the 10-15 set range.
