Analysis Version
v1
History
Back to Study: Muscular and Systemic Correlates of Resistance Tra...
correlational
Analysis v1
39
Pro
0
Against

Even if your testosterone, growth hormone, and IGF-1 levels spike after a workout, that doesn’t mean you’ll grow more muscle over time—those hormone spikes don’t seem to explain why some guys get bigger than others after 16 weeks of lifting weights.

Claim Language

Language Strength

association

Uses association language (linked to, correlated with)

The claim uses 'are not associated with' and 'suggesting these... are not primary drivers,' which indicate a lack of correlation or influence rather than causation, placing it in the 'association' category.

Context Details

Domain

exercise_science

Population

human

Subject

young, untrained males

Action

are not associated with

Target

muscle hypertrophy after 16 weeks of resistance training

Intervention Details

Type: exercise
Duration: 16 weeks

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.

Evidence from Studies

Supporting (1)

39
39

Muscular and Systemic Correlates of Resistance Training-Induced Muscle Hypertrophy

Cohort Study
Human
2013

The study found that even though young men had spikes in muscle-building hormones after workouts, those spikes didn’t predict who gained more muscle. Instead, what happened inside the muscle cells mattered more.

Contradicting (0)

0
No contradicting evidence found

Source Study

Muscular and Systemic Correlates of Resistance Training-Induced Muscle Hypertrophy

Score: 39
DOI: 10.1371/journal.pone.0078636

Similar Assertions

After working out with weights, the levels of certain hormones in the blood don’t predict whether a guy will gain more or less muscle over 16 weeks — so those hormones probably aren’t the main reason some people grow bigger muscles than others.

39
0
98%

Even if your body releases a lot more of the 'muscle-building' hormones after a workout, it doesn’t mean you’ll grow more muscle than someone whose hormone levels stay low—studies show both groups end up with the same muscle size.

1
0
88%

Even if your body releases a lot of muscle-building hormones after a workout, that doesn’t mean you’ll grow more muscle than someone whose hormone levels don’t spike as much—both people end up getting just as strong and muscular.

1
0
87%

Even if your body releases a lot more of the 'muscle-building' hormones after a workout, it doesn’t mean you’ll grow more muscle than someone whose hormone levels stay low—studies show both groups end up with the same muscle size.

1
0
87%

Even if your body releases a lot of muscle-building hormones after a workout, that doesn’t mean you’ll grow bigger muscles any faster than someone whose body releases way less—because studies show both people end up with the same muscle gains.

1
0
86%