- The Role of Effective Reps
The most critical aspect of any set is the number of effective reps performed, defined as the last 5 reps before reaching technical failure. These reps are the most stimulating because they require the recruitment of high-threshold motor units, which are crucial for driving hypertrophy. High-threshold motor units engage larger muscle fibers and produce the most tension, making them the prime targets for growth.
2. The One-Set Rule: Minimum Effective Volume:
If we assume 1 set yields 1 arbitrary unit of hypertrophy, then doing another 5 sets after the first set will net you another unit of hypertrophy, meaning, if you do 6 sets, you have 2. This then shows performing a single set might seem like it could lead to growth over time, but it’s unlikely to be optimal. Adding more sets increases the volume, which is necessary for creating sufficient mechanical tension to elicit muscle adaptation.
3. Balancing Volume and Fatigue:
More volume equals more growth—up to a point. However, there’s a diminishing return after a certain number of sets. For most lifters, 6 sets per muscle group, per workout, is considered the sweet spot. At this point, you’re getting the best balance between stimulation and fatigue management. Any additional sets beyond 6 might only yield minimal hypertrophic benefits while significantly increasing fatigue and recovery time.
4. Quality Over Quantity:
It’s also crucial to focus on the quality of the sets. Simply adding more sets won’t be as effective if they aren’t close to failure or if your form is compromised. Ensuring each set reaches a level of intensity that engages high-threshold motor units is key. This doesn’t mean every set needs to go to absolute failure, but it should be challenging enough to fatigue the targeted muscles effectively.
like a good strategy for minimizing gym time. However, this approach has diminishing returns. Each additional set contributes less to growth compared to the previous one, but it still stacks up to produce a greater total hypertrophic stimulus.
5. Balancing Volume and Fatigue part 2:
While more sets can lead to more growth, it’s important to weigh the benefits against the potential drawbacks. As volume increases, so does fatigue. This added fatigue not only affects muscle recovery but also your nervous system and overall energy levels, which can compromise performance in subsequent workouts.
6. Optimal Weekly Volume: Quality Over Quantity:
To maximize growth, aim for around 12 sets per muscle group per week. This can be split into two or three sessions, depending on your schedule and recovery capacity. With 12 sets, you’re likely to hit the "sweet spot" of hypertrophy, where you’re generating enough effective reps without exceeding your recovery ability. Beyond this range, the return on investment starts to diminish, and recovery could become an issue.
Other Factors to Consider: Intensity, Frequency, and Exercise Selection
- Intensity: The closer you push to failure, the more effective reps you accumulate, even with fewer sets. If you’re training at a high intensity (e.g., 1-2 reps shy of failure), you might find that 4-5 sets are sufficient for maintenance or even slight gains.
2. Frequency: Training a muscle group multiple times a week can spread out the volume and reduce the overall fatigue per session. For example, splitting 12 sets into 2 workouts of 6 sets each might be more manageable than trying to complete all 12 sets in one go.
TLDR: The optimal volume is 12 sets per muscle group, but that also depends on your recovery rate. The lowest possible number of sets you can do in a week to get gains would be 2 sets per muscle group. That will probably net you 50% of your weekly muscle growth, granted you train till failure.