The Claim
Acute spikes in growth hormone immediately following resistance training are not correlated with long-term muscle hypertrophy in young adult males, as evidenced by a significant growth hormone increase (7704% ± 11833%) in the short-rest/low-load group that exhibited greater hypertrophy, yet no statistical association was found between acute growth hormone levels and 8-week changes in muscle cross-sectional area.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Even if your muscles get a big burst of growth hormone right after lifting weights, that doesn’t mean you’ll grow bigger muscles over time—some people who got way more of this hormone didn’t grow more muscle than others.
See the scientific wording
Acute spikes in growth hormone immediately following resistance training are not correlated with long-term muscle hypertrophy in young adult males, as evidenced by a significant GH increase (7704% ± 11833%) in the short-rest/low-load group with greater hypertrophy, but no statistical association between acute GH levels and 8-week changes in cross-sectional area.
What the research says
1 studyStudy: Effects of rest intervals and training loads on metabolic stress and muscle hypertrophy
Even though one group had a huge spike in a growth hormone after lifting weights, and their muscles grew more, the size of the hormone spike didn’t predict how much muscle they gained over time — so the hormone spike isn’t what caused the growth.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.