Risk of sarcopenia and obesity are driven by multiple parameters, including chronic pro-inflammatory cytokine secretion, increased oxidative stress, physical inactivity, malnutrition 12 , and sleep disorders 13 . Modern societies have established an association between metabolic disorders and chronic sleep deprivation 14 through excessive blue-light exposure from social media and computer screening, late social activities, and shift work [15][16][17] . Considering that older individuals are at great risk of obstructive sleep apnea, restless legs syndrome, anxiety disorders, dementia, and psychostimulants, which may trigger insomnia and further disturb sleeping patterns 18,19 , sleep disorders may be Abstract Shortened and fragmented sleeping patterns occupying modern industrialized societies may promote metabolic disturbances accompanied by increased risk of weight gain and skeletal muscle degradation. Short-term sleep restriction may alter energy homeostasis by modifying dopamine brain receptor signaling, leading to hyperpalatable food consumption and risk of increased adiposity. Concomitantly, the metabolic damage caused by lower testosterone and higher cortisol levels may stimulate systemic inflammation, insulin resistance, and suppress pathways involved in muscle protein synthesis. These changes may lead to dysregulated energy balance and skeletal muscle metabolism, increasing the risk of sarcopenic obesity, an additional public health burden. Future trials controlling for food intake and exploring further the influence of sleep deprivation on anabolic and catabolic signaling, and gut peptide interaction with energy balance are warranted.