More gym sets or more gym days? Understanding training volume

Two people can train on different numbers of days while doing similar weekly amounts. That is why “How often do you go?” is only the beginning of a useful conversation about a programme.

Separate the two ideas

In many studies, weekly volume is described using sets for a muscle group. Frequency counts how often that muscle group is trained. These are simplified descriptions: exercise choice, effort, technique and the way sets are counted also matter.

A small arithmetic example

Imagine six planned sets of a movement across a week. They could be divided into two sessions of three or three sessions of two. The number of days has changed while the total remains six. This is a counting example, not a recommended programme.

What recent research found

A 2026 meta-regression examined 67 studies with 2,058 participants. It found patterns consistent with diminishing returns as volume increased, and the relationship with frequency differed between strength and muscle-size outcomes. Most participants were men, which limits how confidently the sample represents everyone.¹

What diminishing returns means

Imagine adding shelves to a cupboard. The first may solve a large storage problem; a later one may help less. That analogy illustrates a curve that becomes flatter. It does not tell you the right number of sets for your body or mean an extra set has no cost.

Something surprising: a set can involve more than one muscle

Counting becomes less straightforward when an exercise uses several muscles. Researchers must decide how to account for direct and indirect work. The 2026 analysis explored different counting approaches. A tidy-looking number can therefore depend on a methodological choice.²

What the evidence does not establish

A statistical relationship across studies is not an individual prescription. It does not identify a universal optimum or show that continually adding sets is wise. The quality of your sessions, available time and ability to recover still need consideration.

What to do with your training record

Write down the work you currently perform before adding more. If you change your weekly schedule, note whether you redistributed the same work or increased the total. Discuss changes with a qualified trainer when you need a programme tailored to you.

Key takeaways

• Frequency and volume answer different questions.
• More weekly work can have diminishing returns.
• Count what you currently do before changing several variables at once.