Health refers to the ability of the person to function effectively, physically, socially, psychologically, spiritually, and intellectually.
Effective physical functioning refers to the ability of the body structures to change and adapt to the changing environment. To different levels of physical stress, the body responds in all parameters of physiological functions, such as, heart rate, neural function, musculoskeletal function and others. The physical stressors may be of many categories. Of them, most important are muscular exercises, ambient temperature, and sound levels at work. The psychological stressors may be economic condition, housing condition, and family environment. The psychological stressors at work also influence individual's health status. Psychological stressors suppress cardiac parasympathetic nervous system activity leading to heart rate variability and eventually cardiovascular disease. Serious disease and treatment experiences affect the psychological, interpersonal, and spiritual wellbeing. It should be mentioned that this might yield both negative and positive outcomes.