Mixed
Resistance training combined with adequate protein intake (approx. 1.6 g/kg/day) maximizes muscle protein synthesis and hypertrophy by activating the mTORC1 pathway, whereas chronic mTOR hyperactivation without balance contributes to metabolic disease.
To maximize muscle growth, engage in resistance training and consume approximately 1.6 grams of protein per kilogram of body weight daily. Distribute this protein evenly across your meals, aiming for about 0.25 g/kg per meal if you are younger, or 0.40 g/kg per meal if you are older to overcome age-related anabolic resistance. Prioritize high-quality, leucine-rich protein sources like whey. To support long-term metabolic health, balance this anabolic focus with periodic AMPK activation through intermittent fasting or aerobic exercise.
Human trials and meta-analyses show that for individuals engaged in resistance training, a total protein intake of approximately 1.6 g/kg/day effectively maximizes muscle protein synthesis, with diminishing returns beyond that level... Sustained mTOR hyperactivation contributes to obesity, insulin resistance, neurodegeneration, and cancer, while AMPK activation counterbalances these effects by restoring cellular energy balance and enhancing metabolic resilience.
Why this rating
The paper cites human trials, meta-analyses, and mechanistic studies, though it is a narrative review without primary data.
Source
The Role of Mammalian Target of Rapamycin (mTOR) and Adenosine Monophosphate-Activated Protein Kinase (AMPK) Signaling in Skeletal Muscle Hypertrophy: A Literature Review With Implications for Health and Disease
Seok Hoo Jeong · Cureus · 2025
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