Key Moments
Combining ROMs for larger strength gains?
Key Moments
Combining full and partial range of motion training may boost strength gains more than full ROM alone, but more research is needed.
Key Insights
Partial range of motion (ROM) training, like rack pulls and board presses, has a historical role in strength development.
While full ROM training is generally superior for full ROM strength, combining full and partial ROM may yield slightly better overall strength gains.
Four studies suggest nominal, though not always statistically significant, advantages for combined ROM training over full ROM alone.
Potential benefits of combined ROM training could be attributed to variety, psychological effects, or specific weakness targeting.
Partial ROM training, especially with heavy loads at short muscle lengths (overload partials), may be less effective for hypertrophy than full ROM.
Targeting specific weakness areas with partial ROM exercises is a clear and effective application for strength development.
HISTORICAL CONTEXT AND TRADITION OF PARTIAL ROM TRAINING
Partial range of motion (ROM) training, utilizing exercises like rack pulls and board presses, has a long-standing tradition in strength sports. Pioneers like Bob Peoples and Paul Anderson incorporated partial movements to build significant strength. Peoples used rack pulls to enhance his deadlift lockout, while Anderson employed partial squats from varying depths. This historical use highlights a long-held belief in the effectiveness of partial ROM work for specific strength development, predating much of the modern scientific research.
RESEARCH ON COMBINING FULL AND PARTIAL RANGE OF MOTION
While full ROM training is empirically supported as more effective for building strength through a full range of motion, most individuals combine training modalities. Research, including a meta-analysis by Milo Wolff, explores the impact of combining full and partial ROM training. Four key studies (Bazyler et al., Gillingham & Debaliso, Pedrosa et al., Whaley et al.) investigated this combination. These studies compared groups performing exclusively full ROM training against those incorporating partial ROM exercises, with varied results but a consistent trend.
ANALYSIS OF KEY STUDIES AND THEIR FINDINGS
The Bazyler study showed a trend towards greater full squat strength gains in a combined ROM group. The Gillingham study, involving collegiate wrestlers, also indicated a nominal advantage for combined ROM training in deadlift strength, though full ROM strength saw a slight decrease in the full-ROM-only group. The Pedrosa study compared different partial ROM combinations against full ROM, finding that combined partials outperformed full ROM across various measurements. The Whaley study on progressive ROM training mirrored these trends, suggesting a potential benefit of combining ROMs.
INTERPRETING THE EVIDENCE AND STATISTICAL SIGNIFICANCE
Aggregating the results from these four studies reveals consistent nominal differences favoring combined ROM training for overall strength gains, though these are not always statistically significant. This leads to a cautious interpretation: while not definitively proven, the evidence suggests a potential benefit. Researchers remain somewhat skeptical but optimistic, awaiting further studies to confirm these trends. The concept of statistical significance itself can be arbitrary, prompting consideration of these consistent nominal advantages.
POTENTIAL MECHANISMS EXPLAINING THE BENEFITS
Several theories attempt to explain why combined ROM training might be beneficial. Enhanced variety in training can prevent staleness and promote adaptation, similar to findings where varied lower body exercises led to better squat strength gains than squatting alone. Psychological factors, such as getting accustomed to heavier loads, could also play a role, particularly in single-rep max testing. Another proposed, though less supported, mechanism involves increased connective tissue or bone strength from heavier loads used in overload partials.
APPLICATIONS AND CONSIDERATIONS FOR TRAINING
Combining full and partial ROM training can be particularly effective when addressing specific weaknesses, such as lockout strength in the bench press or deadlift. For individuals not targeting a specific weakness, the benefit of combining ranges is less clear but promising. It's important to note that overload partials may be less optimal for hypertrophy. If substituting a significant amount of full ROM work with partials, incorporating targeted accessory exercises to compensate for potential hypertrophy deficits is advisable, though not rigorously researched.
ADDRESSING THE 'EGO LIFTING' CONNOTATION
Historically, partial ROM training, especially overload partials, has sometimes been dismissed as 'ego lifting.' However, the emerging research suggests potential benefits beyond simply lifting heavier weights. The studies discussed indicate that incorporating partial ROM exercises, when done strategically, can contribute to strength development. Therefore, dismissing partials entirely may overlook a valuable training tool, and individuals exploring these methods should not be deterred by such criticisms.
Mentioned in This Episode
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Partial Range of Motion Training: Dos and Don'ts
Practical takeaways from this episode
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Common Questions
Partial ROM training involves performing exercises through only a portion of the full range of motion, often focusing on shorter muscle lengths or specific sticking points in a lift. Examples include rack pulls, board presses, and pin squats.
Topics
Mentioned in this video
A 2021 study comparing full range of motion knee extensions to a combination of partial ranges of motion, finding the combined approach produced larger strength gains in all tested ranges.
A 2020 study using progressive range of motion training (starting with quarter squats and gradually increasing ROM) which showed nominal benefits in squat one-rep max and vertical jump height compared to exclusively full range of motion training.
A 2014 study that suggested variety in training exercises can lead to greater strength gains compared to only performing squats.
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