Resistance training works by: Activating mTOR pathways: Mechanical tension from lifting triggers molecular pathways that promote muscle protein synthesis, counteracting the catabolic environment of caloric restriction Increasing insulin sensitivity: Muscle contractions enhance glucose uptake independent of insulin, improving metabolic health markers Stimulating anabolic hormones: Resistance exercise acutely increases growth hormone and testosterone, both protective against muscle loss Maintaining neuromuscular efficiency: Regular lifting preserves the brain-muscle connection, preventing the rapid strength losses seen with detraining The dose-response relationship is clear: 2 sessions weekly provides significant benefit, 3 sessions provide optimal results for most people, and 4+ sessions offer marginal additional gains for advanced trainees

Previous work showed that pluripotency transcription factors play important roles in PGC development, with conditional inactivation of either Oct4 or Sox2 resulting in loss of PGCs due to apoptosis or reduced proliferation, respectively
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Glutathione binds to tyrosinase, making it less effective thereby slowing down melanin production
Comment Apoptosis is a form of genetically controlled programmed cell death. Microscopically in H&E-stained tissue sections, apoptosis appears as dense eosinophilic shrunken cell bodies with maintenance of membrane integrity, nuclear fragmentation and cytoplasmic budding, and without an inflammatory response