People with more slow-twitch muscles have to do more reps and lift more total weight to get the same muscle growth as people with more fast-twitch muscles, even when both train until exhaustion.

Scientific Claim

Slow-typology individuals require significantly higher total training volume (measured in repetitions × load) to achieve the same muscle hypertrophy and strength gains as fast-typology individuals during resistance training to failure at 60% 1RM.

Original Statement

“However, ST individuals performed a significantly higher training volume to gain these similar adaptations than FT individuals.”

From study:Can muscle typology explain the inter‐individual variability in resistance training adaptations?

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

definitive

Can make definitive causal claims

Assessment Explanation

The study used a within-subject RCT design with direct measurement of training volume and outcomes, and found a statistically significant difference (p=0.033) with a clear effect size (ES=0.229), justifying definitive language.

Evidence from Studies

Supporting (1)

Can muscle typology explain the inter‐individual variability in resistance training adaptations?

Randomized Controlled Trial

Human

2023 Jun

People with more slow-twitch muscles had to do more reps and sets to get as strong and muscular as people with more fast-twitch muscles—even when both groups trained the same way and pushed to exhaustion.

Contradicting (0)

No contradicting evidence found

Source Study

Can muscle typology explain the inter‐individual variability in resistance training adaptations?

Score: 62

DOI: 10.1113/JP284442

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