Scientists watched the brain’s sleep switch fire in real time — and the feedback loop they found changes how we understand ...

New research from UC Berkeley suggests that the quality of your deep sleep is doing far more than helping you feel rested. It ...

UC Berkeley just mapped the brain circuit behind your nightly growth hormone surge - here's why your first 3 hours of sleep matter.

Physiologists have known for years that the biggest nightly growth-hormone pulse lines up with early slow-wave sleep, usually ...

Discover how hormones, metabolism, and lifestyle factors contribute to weight gain in women over 50. Also, learn tips for ...

“[…]we have identified FGF21 as a novel biomarker in ALS that is detected in multiple compartments including muscle, spinal cord, and circulation.” In this ...

A paracrine hormone of skeletal muscle acts as an endocrine signal for the synthesis of a sex hormone. Scientists at McGill University have observed in mice how myostatin, which inhibits the ...

A. Fluorescent immunostaining of PDGFRα, showing mesenchymal progenitors, laminin surrounding skeletal muscle, and AR. Arrows indicate mesenchymal progenitors expressing AR, arrowheads indicate ...

Among patients with Klinefelter and Kallmann syndromes on testosterone therapy, body composition was altered, and appendicular lean mass (ALM) differed between the groups. Follicle-stimulating hormone ...

Here’s why some muscle groups respond faster (or slower) to strength training—and what you can do about it.