Maintain Up, You Do not Want Extra Coaching Quantity?

Is growing units and reps the important thing to extra muscle positive factors?

Final up to date on February eleventh, 2025

Amongst many debated resistance coaching subjects is optimizing training volume. Natural Fitness and Figure champion Holly Baxter lately mentioned a examine by Enes and colleagues from the College of Tampa, which examined whether or not growing quantity weekly causes muscle development versus retaining units the identical per coaching cycle. (1)

The Research’s Variables 

Thirty recreationally skilled ladies have been randomly assigned to one in all three coaching protocols over 12 weeks:

• Fixed quantity group: 22 units of quad exercises weekly.
• Average development group: Began at 16 weekly units and elevated by two units every two weeks for 26 whole units.
• Aggressive development group: Started with 18 units weekly, including 4 units each two weeks for 38 whole units.

Volunteers skilled three workout routines—leg presses, squats, and leg extensions—twice weekly. To maximise the working units, the primary two units of every train have been carried out with roughly two reps in reserve, and the closing set was pushed to failure.

[Related: Learn How to Do the Stiff-Legged Deadlift Like Dorian Yates]

The Verdict 

After the 12-week experiment, muscle thickness was remeasured alongside the vastus lateralis (outer quad muscle) at 30, 50, and 70 p.c lengths. Cross-sectional space (CSA) was measured on the 50% mark for the vastus lateralis. 

Measuring solely a part of a muscle is an inaccurate solution to assess outcomes since muscle mass don’t essentially develop uniformly throughout their size, also referred to as regional hypertrophy. (2)(3)

Researchers discovered no vital variations in total muscle development between the three teams. Nonetheless, the best quantity group had essentially the most vastus lateralis development at 50 p.c size, however not far more than different teams.

The reasonable and aggressive development teams confirmed comparable development, whereas no statistical distinction was noticed between the fixed and gentle teams. These findings recommend that scaling coaching quantity with diminishing returns could also be helpful. Nonetheless, muscle development is extra advanced than a single examine with restricted elements.

Limitations 

A current examine by the identical analysis crew, carried out on males, confirmed minimal added advantage of weekly quantity will increase. (4) “The variations within the inhabitants and total quantity might clarify the variations between these research,” Baxter theorized. 

Furthermore, the examine on females didn’t embody a non-exercise management group, making it troublesome to find out the reliability of the measurement instruments. One other constraint is barely assessing quad development, which could not apply to different muscle mass.

Baxter’s Key Takeaways & Ideas

How does this information translate to programming your exercises? Listed below are Baxter’s 5 suggestions:

1. Begin with an sufficient baseline quantity
   • Purpose for no less than 10-20 units per muscle group weekly. (5)
2. Step by step, progress units & reps
   • Add one to 2 units each few weeks.
3. Monitor progress or lack thereof
4. An individualized method is vital 
   • Folks reply in another way to quantity adjustments. Regulate as wanted. (6)
5. Quantity is just one issue
   • Ample progressive overload, depth, method, rep tempo, and coaching near failure can maximize muscle positive factors.

Whereas growing coaching quantity is important, chasing larger set counts must be strategic.

Extra Bodybuilding Content material

References

1. Enes, A., Correa, C. L., Bernardo, M. F., Salles, G. N., Oneda, G., Leonel, D. F., Fleck, S. J., Phillips, S. M., De Souza, E. O., & Souza-Junior, T. P. (2025). Does growing the resistance-training quantity result in better positive factors? The results of weekly set progressions on muscular variations in females. Journal of sports activities sciences, 1–12. Advance on-line publication. https://doi.org/10.1080/02640414.2025.2459003
2. Wakahara, T., Miyamoto, N., Sugisaki, N., Murata, Ok., Kanehisa, H., Kawakami, Y., Fukunaga, T., & Yanai, T. (2012). Affiliation between regional variations in muscle activation in a single session of resistance train and in muscle hypertrophy after resistance coaching. European journal of utilized physiology, 112(4), 1569–1576. https://doi.org/10.1007/s00421-011-2121-y
3. Diniz, R. C. R., Tourino, F. D., Lacerda, L. T., Martins-Costa, H. C., Lanza, M. B., Lima, F. V., & Chagas, M. H. (2022). Does the Muscle Motion Period Induce Totally different Regional Muscle Hypertrophy in Matched Resistance Coaching Protocols?. Journal of power and conditioning analysis, 36(9), 2371–2380. https://doi.org/10.1519/JSC.0000000000003883
4. Enes, A., DE Souza, E. O., & Souza-Junior, T. P. (2024). Results of Totally different Weekly Set Progressions on Muscular Variations in Educated Males: Is There a Dose-Response Impact?. Medication and science in sports activities and train, 56(3), 553–563. https://doi.org/10.1249/MSS.0000000000003317
5. Bernárdez-Vázquez, R., Raya-González, J., Castillo, D., & Beato, M. (2022). Resistance Coaching Variables for Optimization of Muscle Hypertrophy: An Umbrella Evaluate. Frontiers in sports activities and energetic dwelling, 4, 949021. https://doi.org/10.3389/fspor.2022.949021
6. Lim, C., Nunes, E. A., Currier, B. S., McLeod, J. C., Thomas, A. C. Q., & Phillips, S. M. (2022). An Proof-Primarily based Narrative Evaluate of Mechanisms of Resistance Train-Induced Human Skeletal Muscle Hypertrophy. Medication and science in sports activities and train, 54(9), 1546–1559. https://doi.org/10.1249/MSS.0000000000002929

Featured picture: @hollytbaxter on Instagram