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.

In healthy adult men and women, compare muscle protein synthesis rates and 8–12 weeks of hypertrophy in two limbs of the same individual—one trained to induce high systemic hormone elevation, the other trained to induce low systemic hormone elevation (e.g., via unilateral low-load/high-volume vs. unilateral high-load/low-volume protocols), while controlling for total volume, nutrition, and hormonal suppression of the non-trained limb.

In healthy men and women, suppress acute post-exercise testosterone, GH, and IGF-1 using pharmacological agents (e.g., GnRH antagonist, somatostatin analog) during one training session and compare muscle protein synthesis and 12-week hypertrophy to a non-suppressed session in the same individuals.

Track muscle hypertrophy and MPS over 12 weeks in a cohort of men and women undergoing identical resistance training, and correlate individual variability in post-exercise hormone spikes with muscle growth outcomes.

Compare muscle hypertrophy and MPS in individuals with congenital or acquired anabolic hormone deficiencies (e.g., hypogonadism, GH deficiency) versus matched controls undergoing identical resistance training.

Synthesize all existing unilateral training studies comparing muscle growth between limbs with discordant hormonal responses to determine if hormonal differences predict hypertrophy differences.