Rest Redistributed Sets: Shorter Rest, Same Gains!

Rest Redistributed Sets Increase Muscle Growth Similar to Traditional Training Summary

Thirty men untrained men were pair-matched and randomly assigned to a traditional resistance exercise (i.e., four sets of 10 repetitions per exercise with 120-second rest between sets) or a rest redistributed sets (i.e., eight sets of five repetitions per exercise with 51-second rest between sets.)
Both groups saw a decrease in body fat and an increase in muscle mass, lower-body muscular maximal strength, and endurance performance compared to baseline.
Rest redistributed protocols result in increases in muscle growth similar to those of traditional training.

The Role of Resistance Training in Muscle Growth

Resistance training is a foundational component of bodybuilding, resulting in muscle hypertrophy, strength, and overall physical performance. Interestingly, the effectiveness of resistance training in promoting muscle hypertrophy and performance relies on multiple factors within the training program, including volume (sets), load intensity (amount of weight used), rest intervals, frequency, time under tension (how long it takes to complete the set), and type of contraction (lifting or lowering).

Understanding Rest Redistributed Sets

Moreover, a new concept in bodybuilding is rest redistributed sets, which est redistributed sets, break Rest redistributed sets have been shown to increase muscle growth similar to traditional training, making them an effective alternative for bodybuilders. The shorter rest intervals in rest redistributed sets can help reduce the total rest time typically taken between sets in traditional resistance training into shorter and more frequent intervals. Rather than resting longer after completing a set, rest redistribution involves taking shorter breaks between sets (i.e., 30 seconds to 1 minute), aiming to reduce fatigue during the workout while maintaining performance levels.

Traditional Sets vs. Rest Redistributed Sets

Traditionally, trainers perform sets without rest between repetitions, followed by a designated rest interval to allow recovery before proceeding to the next set. This conventional approach to resistance training set prescription, known as a traditional set structure, suggests that 2-3 minute rest periods are superior for increasing muscle growth(“American College of Sports Medicine position stand. Progression models in resistance training for healthy adults,” 2009).

Comparative Analysis of Rest Periods and Muscle Growth

Previous studies have suggested that longer rest periods result in greater muscle protein synthesis, volume, and recuperation between sets. However, a recent study by Jun Mao, published in Frontiers in Physiology (December 2023), suggests that longer rest periods may not be superior for increasing muscle growth. The study compared the effects of traditional training and rest redistributed sets on muscle hypertrophy and performance in untrained young men. (Mao et al., 2023) Before getting into the study, it’s important to understand the background of rest redistributed rest periods such as cluster sets.

Cluster Sets: Enhancing Muscle Growth

Cluster set training and rest-pause are advanced resistance training techniques that have gained attention for their potential to promote muscle hypertrophy. They incorporate short intra-set rest periods, typically 10 to 45 seconds, within each set of exercises. This strategy aims to prevent fatigue, preserve movement quality, and reduce the accumulation of metabolic byproducts, thereby maintaining higher performance levels throughout the training session.(Hardee et al., 2012; Jukic et al., 2020)

Plus, taking shorter breaks during cluster sets could boost muscle growth by increasing metabolic stress and improving muscle fiber recruitment and muscle swelling. (Fink et al., 2016). Cluster set training has been suggested as an alternative to traditional sets for promoting muscle hypertrophy over time during similar periodization models.(Krzysztofik et al., 2019)

Moreover, cluster sets may prevent monotony and increase total training volume, identified as a key stimulus for muscle hypertrophy. In a cluster set resistance training program, you can do more reps and lift heavier, which can help you build more muscle. (Vargas-Molina et al., 2021) So basically, cluster set training can help you build more muscle by increasing how much you lift and the overall training volume.

Why You Should Try Cluster Sets

Cluster sets are great because they help you keep up your strength and speed during workouts. By allowing brief rest periods within sets, athletes can recover more effectively between repetitions, leading to more consistent performance and potentially higher overall training volume. This method is especially advantageous during exercises that require maintaining maximum power and speed in order to optimize training benefits.(Tufano et al., 2017)

Cluster sets have various advantages compared to traditional set structures. These include better power maintenance, improved movement quality, decreased metabolic stress, and versatility across different populations. These benefits make cluster sets a valuable tool in the arsenal of training strategies for achieving diverse training goals and accommodating various training populations.(Boffey et al., 2021; Dello Iacono et al., 2020; Oliver et al., 2013)

Rest redistributed sets vs. Cluster Sets.

Rest redistributed sets and cluster sets share some similarities in terms of incorporating shorter rest intervals within the workout. However, there are key differences between the two training methods:

Rest Redistribution Sets: In rest redistributed sets, the total rest time typically taken between sets in traditional resistance training is broken into shorter and more frequent intervals. The goal is to reduce overall fatigue during the workout while maintaining performance levels by redistributing the rest time.

Example

Traditional Approach: 4 sets of 10 repetitions with 120 seconds of rest between sets.
Rest Redistributed Sets Approach:
Perform 8 sets of 5 repetitions.
Rest for only 51 seconds between each set.

Cluster Sets: Cluster sets incorporate short intra-set rest periods within each set. Instead of resting between sets, individuals take brief rest intervals within a set of repetitions. This approach aims to maintain performance and technique throughout the set while allowing for partial recovery between repetitions.

Cluster Set Example

Select a weight that you could lift for a conventional set of 8-10 repetitions (around 75% of 1RM).
Perform 4 repetitions, then rest for 20 seconds (this is one mini-set).
Repeat this mini-set sequence 2 more times (for a total of 3 mini-sets) without changing the weight.
This completes one full cluster set.

While both rest redistributed sets and cluster sets focus on managing fatigue and maintaining performance during resistance training, the specific implementation and timing of rest intervals differ between the two methods. Rest redistributed sets redistribute the total rest time between sets. In contrast, cluster sets incorporate rest periods within a set of repetitions.

The Study at a Glance: Investigating Rest Redistributed Sets

Mao et al. (2023) embarked on a comparative analysis of traditional resistance exercise and rest redistributed sets to demystify the impacts of set structure on resistance training outcomes. The study’s core objective was to ascertain whether these differing set structures would influence muscle growth and performance metrics, such as hypertrophy, strength, power, and endurance, in a cohort of untrained individuals.

Traditional Resistance Exercise vs. Rest Redistributed Sets Protocol

The study’s design was meticulously planned to compare the traditional resistance exercise and rest redistribution protocols. Thirty untrained young men were evenly split into two groups, undergoing an 8-week resistance training regimen. The traditional resistance exercise group adhered to a protocol of four sets of 10 repetitions with 120 seconds of rest between sets. Conversely, the rest redistribution group engaged in eight sets of five repetitions, with a shortened 51-second rest interval between sets.

This design allowed for a nuanced examination of how set structure influences training efficacy, controlling for total exercise volume and rest duration. Pre- and post-intervention assessments spanned body composition, muscle thickness, and performance measures, including maximal strength, power output, and endurance. The traditional and rest redistribution protocols were designed to have equal total training volume, intensity, and total rest time. (Mao et al., 2023).

No Differences in Muscle Growth Between Traditional Resistance Exercise and Rest Redistributed Sets

The study results were that both traditional resistance exercise and rest redistribution protocols significantly enhanced muscle hypertrophy, strength, and endurance without notable differences between the groups. This parity suggests that the specific structure of sets in resistance training may not critically impact the outcomes for untrained individuals. Notably, both groups saw reductions in body fat mass and increases in fat-free mass and muscle thickness, alongside improvements in upper and lower body strength. (Mao et al., 2023).

Concluding Thoughts on Rest Redistributed Sets

The findings from this study highlight a pivotal point: the structure of rest intervals in resistance training, whether traditional or rest redistributed, may not drastically impact muscle growth outcomes. This revelation encourages fitness enthusiasts and trainers to consider more personalized workout designs, prioritizing individual preferences and schedules while achieving desired results. This flexibility could lead to greater adherence to resistance training programs and ultimately, enhanced fitness outcomes for a wider range of individuals.

References

American College of Sports Medicine position stand. Progression models in resistance training for healthy adults. (2009). Med Sci Sports Exerc, 41(3), 687-708. https://doi.org/10.1249/MSS.0b013e3181915670

Boffey, D., Clark, N. W., & Fukuda, D. H. (2021). Efficacy of Rest Redistribution During Squats: Considerations for Strength and Sex. J Strength Cond Res, 35(3), 586-595. https://doi.org/10.1519/jsc.0000000000003893

Dello Iacono, A., Martone, D., & Hayes, L. (2020). Acute mechanical, physiological, and perceptual responses in older men to traditional-set or different cluster-set configuration resistance training protocols. Eur J Appl Physiol, 120(10), 2311-2323. https://doi.org/10.1007/s00421-020-04453-y

Fink, J., Schöenfeld, B. J., Kikuchi, N., & Nakazato, K. (2016). Acute and Long-Term Responses to Different Rest Intervals in Low-Load Resistance Training. International Journal of Sports Medicine. https://doi.org/10.1055/s-0042-119204

Hardee, J., Lawrence, M., Zwetsloot, K., Triplett, N., Utter, A., & McBride, J. (2012). Effect of cluster set configurations on power clean technique. Journal of Sports Sciences, 31. https://doi.org/10.1080/02640414.2012.736633

References

Jukic, I., Ramos, A. G., Helms, E. R., McGuigan, M. R., & Tufano, J. J. (2020). Acute Effects of Cluster and Rest Redistribution Set Structures on Mechanical, Metabolic, and Perceptual Fatigue During and After Resistance Training: A Systematic Review and Meta-analysis. Sports Med, 50(12), 2209-2236. https://doi.org/10.1007/s40279-020-01344-2

Krzysztofik, M., Wilk, M., Wojdała, G., & Gołaś, A. (2019). Maximizing Muscle Hypertrophy: A Systematic Review of Advanced Resistance Training Techniques and Methods. International Journal of Environmental Research and Public Health. https://doi.org/10.3390/ijerph16244897

Mao, J., Wang, T., Wang, Y., & Kuan, G. (2023). Effect of resistance training programs differing in set structure on muscular hypertrophy and performance in untrained young men [Original Research]. Frontiers in Physiology, 14. https://doi.org/10.3389/fphys.2023.1301535

Oliver, J. M., Jagim, A. R., Sanchez, A. C., Mardock, M. A., Kelly, K. A., Meredith, H. J., Smith, G. L., Greenwood, M., Parker, J. L., Riechman, S. E., Fluckey, J. D., Crouse, S. F., & Kreider, R. B. (2013). Greater gains in strength and power with intraset rest intervals in hypertrophic training. J Strength Cond Res, 27(11), 3116-3131. https://doi.org/10.1519/JSC.0b013e3182891672

Tufano, J. J., Brown, L. E., & Haff, G. G. (2017). Theoretical and Practical Aspects of Different Cluster Set Structures: A Systematic Review. J Strength Cond Res, 31(3), 848-867. https://doi.org/10.1519/jsc.0000000000001581

Vargas-Molina, S., Petro, J. L., Bonilla, D. A., Baz-Valle, E., Carbone, L., Cannataro, R., & Benítez-Porres, J. (2021). Cluster Sets for Muscle Hypertrophy: A Short Review †. Obm Integrative and Complementary Medicine. https://doi.org/10.21926/obm.icm.2201010