Briefing Document: One Set Training for Muscle Growth
Subject: Examining the efficacy of low-volume (one set) resistance training for muscle hypertrophy in trained lifters.
Key Themes & Ideas:
This document explores the surprising potential of single-set resistance training for muscle growth, even in experienced lifters. The main takeaways challenge the conventional wisdom of multiple sets being essential for hypertrophy and highlight the importance of training intensity and consistency.
Low Volume Can Stimulate Growth: The core argument is that you don't necessarily need a high volume of sets to trigger muscle growth, even if you're already well-trained. A study by Hermann et al. (2024, as referenced within the text), showed that trained lifters did experience muscle growth with just one set per exercise. The excerpt notes, "even well-trained individuals can stimulate muscle growth with relatively low training volumes."
Study Details: The Hermann et al study involved 42 trained lifters (average 5 years experience) who trained twice a week with nine exercises per workout. Participants were divided into two groups: one trained to failure, the other stopped when they felt they could only perform two more reps. Both groups only performed one set per exercise.
Results: Lifters experienced an average increase of 2-10% in muscle thickness over an eight-week period.
Training to Failure Matters: The study suggests that pushing sets to failure is beneficial for muscle growth when using a single-set approach. The briefing notes, "it’s likely that you will see better hypertrophy by taking your sets to failure versus keeping a few repetitions in reserve." This aligns with a meta-analysis by Robinson et al.
Fractional Sets: The text refers to "fractional weekly sets," a concept discussed by Pelland et al. The lifters in the Hermann et al. study accumulated around four fractional weekly sets for the measured muscle groups (quadriceps, biceps, and triceps).
Minimum Effective Dose: Pelland et al.'s meta-analysis (pre-printed) found that "only four fractional weekly sets were required to elicit detectable muscle hypertrophy." They defined the "minimum effective dose" as the volume at which the estimated marginal mean exceeds the Smallest Detectable Effect Size (SDES), which is 2.05% for hypertrophy and 3.96% for strength.
Consistency over Volume: The excerpt emphasises the importance of consistency, stating "Consistency matters more than volume—just one or two workouts per week can make a significant impact!"
Practical Implications: This approach can be useful for people short on time, motivation, or who dislike high-volume training. A single set workout can be effective in promoting muscle growth.
Health Benefits: The document also mentions the synergy between single-set training and overall health goals. "just spending an hour or two in the gym per week may also be sufficient to reap the health benefits."
Maintenance Volume: Even lower volumes (two or three fractional weekly sets) may be sufficient to maintain muscle mass.
Important Considerations:
Not Maximising Hypertrophy: While single-set training can stimulate growth, the excerpt acknowledges that it may not be optimal for maximising hypertrophy.
Individual Variation: Results can vary depending on individual factors, exercise selection, and other training variables.
Conclusion:
This briefing highlights that significant muscle growth can be achieved with surprisingly low training volumes, even in trained individuals, provided sets are taken to failure. This approach offers a time-efficient and potentially more sustainable method for building and maintaining muscle mass.