Do high-rep and moderate-rep training regimes produce the same muscle growth on average?

Research generally indicates that, on average, when sets are taken to or near failure, moderate rep (e.g., 10 reps) and high rep (e.g., 25-30 reps) sets can result in similar hypertrophy. However, this average effect doesn't mean it applies equally to all individuals.

Can personal training experiences contradict scientific averages?

Yes, personal experiences can conflict with average scientific findings. An individual might respond exceptionally well or poorly to a specific method, even if the research shows no average difference or a different trend. This doesn't mean the science is wrong, only that the individual had an atypical response.

Are raw eggs as good as cooked eggs for muscle protein synthesis?

While cooked eggs lead to a significantly greater increase in blood amino acid levels (due to better digestibility), a direct study found that acute muscle protein synthesis rates were virtually identical between raw and cooked egg consumption after resistance training.

How does protein quality impact muscle growth?

Protein quality, based on amino acid composition and digestibility, is important but often overemphasized. A 'good enough' protein source that provides sufficient essential amino acids and is digestible is usually sufficient for maximizing hypertrophy, especially when overall protein intake is adequate. Minor differences in quality scores don't typically translate to significantly better long-term muscle growth.

Do I need to eat more protein on a vegan or vegetarian diet to build muscle?

Recent studies suggest that adequate protein intake (e.g., 1.6-1.8 grams per kg body weight) can lead to similar muscle protein synthesis rates and hypertrophy in both vegan and omnivorous diets, provided the vegan diet includes a variety of plant-based protein sources to ensure essential amino acid coverage.

What are complementary proteins and why are they important for plant-based diets?

Complementary proteins are combinations of plant-based protein sources that, when eaten together, provide all essential amino acids that might be lacking in individual sources (e.g., lysine and methionine). Consuming a mix of various plant proteins throughout the day ensures a complete amino acid profile.

What are the general protein intake recommendations for maximizing hypertrophy?

For maximizing hypertrophy, aim for at least 1.6 grams of protein per kilogram of total body weight per day (or about 2 grams per kilogram of fat-free mass per day). It is also recommended to distribute this protein into 3 to 6 servings throughout the day, though the meal distribution's importance is debated.

Key Moments

Individual Responses to Training and Protein Quality (Episode 97)

Stronger By Science

Sports4 min read92 min video

Sep 26, 2022|5,060 views|219|28

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Key Moments

TL;DR

Individual training responses vary greatly, and protein quality's impact on muscle growth is less critical than assumed.

Key Insights

Individual responses to training interventions can differ significantly, meaning group-level findings may not apply universally.

While research shows similar average results for moderate vs. high rep training, individual responses can be vastly different.

Crossover or within-subject unilateral study designs are crucial for understanding individual training responses.

Protein quality and digestibility affect acute muscle protein synthesis, but these short-term changes don't always predict long-term hypertrophy.

For most individuals, consuming adequate total protein from a mixed diet is more important than meticulously optimizing protein source quality.

Vegan and omnivorous diets with sufficient total protein yield similar results for strength and hypertrophy over time.

In specific scenarios like medically restricted low-protein diets, prioritizing higher-quality proteins may be more important.

THE SPECTRUM OF TRAINING RESPONSES

The episode begins by highlighting a common misconception in fitness: that group-level research findings will directly predict individual outcomes. Greg emphasizes that while research often shows average similarities between different training protocols (e.g., moderate versus high repetition ranges for hypertrophy), these averages can mask substantial inter-individual variability. This means that what works well on average may not work well, or may even be detrimental, for a specific person. Understanding this variability is key to making informed training decisions.

RESEARCH DESIGNS AND INDIVIDUAL DATA

To illustrate the variability in training responses, Greg discusses a study by Carneiro et al. on post-menopausal women. This study used a crossover design, where participants experienced both low-load (27-31 reps) and moderate-load (8-12 reps) training. While the *average* lean mass gains were similar for both protocols, the individual responses varied dramatically. Some individuals experienced significant muscle loss with moderate loads and gains with low loads, while others showed the opposite. This highlights why crossover and within-subject unilateral designs are superior for understanding individual differences compared to parallel-group studies.

NAVIGATING TRAINING DECISIONS

The practical implication of this variability is that relying solely on average group data can be misleading. Content creators must be cautious about generalizing their personal experiences or findings from group studies. Similarly, consumers should be wary of dismissing research that contradicts their personal experience; their outcome might simply be an atypical response. The idea that 'you are not a special snowflake' can sometimes overshadow the reality of significant biological differences between individuals, which can impact training outcomes.

PROTEIN QUALITY AND MUSCLE PROTEIN SYNTHESIS

The discussion shifts to protein quality, exploring the difference between raw and cooked eggs. While raw eggs are famously associated with Rocky Balboa, research indicates cooking significantly improves protein digestibility. A study by Fuchs et al. compared raw and cooked egg consumption post-resistance training. Although cooked eggs led to a more robust acute amino acid response (particularly leucine) in the blood, this did not translate to a significantly greater muscle protein synthesis rate compared to raw eggs over a five-hour period. This suggests that immediate blood amino acid kinetics don't perfectly predict short-term muscle protein synthesis.

THE CHAIN OF PROTEIN ASSUMPTIONS

Greg elaborates on a common chain of assumptions: higher protein quality (amino acid profile and digestibility) leads to a better blood amino acid response, which leads to better acute muscle protein synthesis (MPS), which ultimately leads to better long-term hypertrophy. However, this chain often breaks down. While higher-quality proteins and animal-based proteins generally show better acute MPS, these differences tend to fade considerably when resistance training is involved. Furthermore, these acute MPS differences do not reliably predict long-term gains in muscle size or strength.

PRACTICAL PROTEIN INTAKE STRATEGIES

For most individuals aiming for hypertrophy, the focus should be on total daily protein intake (around 1.6-2.2 g/kg body weight) and ensuring a mix of protein sources rather than obsessing over marginal differences in quality. Even vegan and omnivorous diets, when providing adequate total protein, have shown similar results in strength and hypertrophy over time. The key is to avoid glaring deficiencies in essential amino acids by consuming complementary protein sources and preparing foods appropriately. Over-managing specific protein scores is generally less impactful than ensuring sufficient total intake and variety.

WHEN PROTEIN QUALITY MATTERS MORE

While micromanaging protein quality is often unnecessary, there are specific situations where it becomes more pertinent. For individuals undergoing medically supervised low-protein diets, where total protein intake is restricted below typical recommendations for athletes, prioritizing higher-quality proteins becomes more important. This allows individuals to maximize the 'bang for their buck' by ensuring they obtain sufficient leucine and essential amino acids from the limited protein available, thereby better supporting hypertrophy and strength gains within those constraints.

Mentioned in This Episode

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●People Referenced

Common Questions

Individual variability refers to how different people respond uniquely to the same training protocols. While some interventions may show similar average effects across a group, individuals within that group can have vastly different outcomes, performing much better or worse with specific approaches.