The Claim

In healthy young men aged 18–30 years, pharmacologically induced hypogonadism attenuates gains in fat-free mass during 6 weeks of supervised resistance exercise training, as placebo-treated individuals gain an average of 1.5 kg of fat-free mass while hypogonadal individuals show no significant increase (0.4 kg, p = 0.61), indicating that endogenous testosterone is necessary for the full anabolic response to resistance training.

Source: Pharmacological hypogonadism impairs molecular transducers of exercise‐induced muscle growth in humans

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
74score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

If young guys are given a drug that lowers their testosterone, they don’t build much muscle from weight training—while others with normal testosterone gain about 1.5 kg of muscle in 6 weeks. This shows testosterone is key for getting the most out of lifting weights.

See the scientific wording

Pharmacologically induced hypogonadism in healthy young men (18–30 years) blunts fat-free mass gains during 6 weeks of supervised resistance exercise training, with placebo recipients increasing fat-free mass by 1.5 kg on average while hypogonadal men show no significant change (0.4 kg increase, p = 0.61), demonstrating that endogenous testosterone is required for full anabolic response to resistance training.

What the research says

1 study
  1. Study: Pharmacological hypogonadism impairs molecular transducers of exercise‐induced muscle growth in humans

    The study found that when testosterone was lowered in young men, they didn’t gain muscle from weight training like those with normal testosterone levels did.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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