Tailoring resistance exercise programs to a person's specific muscle endurance capacity, instead of using the same number of repetitions for everyone, may result in more consistent physical...

Pro

Against

Mechanism

Synthesis from 1 study

How it works

People’s muscles get tired at different speeds during strength training because of how their muscles are built and how they handle waste products. Letting each person stop when they’re truly exhausted — instead of making everyone do the same number of reps — makes the level of stress on their...

Most probable mechanism

In Simple Terms

When people do strength exercises, their muscles get tired at different rates because of how well their muscle fibers handle stress and clear waste products. Letting each person stop when they’re truly tired — instead of forcing everyone to do the same number of reps — makes the training feel similarly hard for everyone, which leads to more consistent muscle growth and strength gains over time (10.1080/17461391.2021.2023657).

Causal chain

Individual differences in muscle fiber composition and metabolic efficiency lead to variation in the time-to-fatigue during submaximal resistance contractions, causing some individuals to reach metabolic stress thresholds earlier than others (10.1080/17461391.2021.2023657)

Supported by evidence

which leads to

When exercise is terminated at individualized fatigue thresholds, the level of metabolic accumulation (e.g., lactate, hydrogen ions) and motor unit recruitment reaches a comparable physiological stress level across individuals, despite differing repetition counts (10.1080/17461391.2021.2023657)

Supported by evidence

which leads to

Consistent metabolic stress levels across individuals lead to more uniform activation of downstream signaling pathways (e.g., mTOR, MAPK) that regulate muscle protein synthesis and hypertrophy, resulting in greater consistency in physiological adaptations (10.1080/17461391.2021.2023657)

Indirect evidence only

Evidence from Studies

Supporting (1)

Community contributions welcome

Does performing resistance exercise to failure homogenize the training stimulus by accounting for differences in local muscular endurance?

Cross-Sectional Study

Human

2023 Jan

Contradicting (0)

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Does performing resistance exercise to failure homogenize the training stimulus by accounting for differences in local muscular endurance?

Score: 22

DOI: 10.1080/17461391.2021.2023657

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