The Most Favorable Age for Janitorial Work: Biological, Economic, and Social Aspects of Optimality Defining the "most favorable age" for the profession of a janitor (terrestrial cleaner) is a comprehensive interdisciplinary task, lying at the intersection of ergonomics, labor physiology, economics, and sociology. Contrary to the widespread belief that this is work "for retirees," the analysis shows the existence of an optimal age window where physical capabilities, psychological resilience, and economic rationality coincide. 1. Biophysiological Aspects: Optimal Balance of Endurance and Adaptation. The profession of a janitor is associated with moderate physical exertion, but with a high level of monotony and exposure to external factors (temperature fluctuations, humidity, seasonal allergens). Physiology identifies several age phases: Peak physical endurance (25-40 years): Biologically, this period is optimal for cyclic physical labor. The body has the maximum reserves of the cardiovascular system, muscle strength, and speed of recovery. However, at this age, people are usually oriented towards career growth and higher-paying activities. Janitorial work in this range is often perceived as temporary or forced, leading to high staff turnover. Period of stable work capacity (40-55 years for men, 40-50 years for women): This is the hidden biophysiological optimum for this profession. Endurance remains high, while "professional body wisdom" develops — the ability to optimally distribute efforts, avoid injuries, and adapt to loads. The psychoemotional sphere stabilizes, which is important for monotonous work. However, after 45-50 years, there begins a gradual decrease in adaptive reserves to cold and heat, and the risk of developing musculoskeletal diseases due to improper labor organization increases. Period of compensated work capacity (55-65 years and older): After the standard retirement age, physiological capabilities decrease: muscle mass decreases (sarcopenia), bon ... Read more