Abstract

Overweight and obesity are considered one of the most important health issues in 20 years, its reached epidemic level and become international public health priority. Obesity and overweight are defined as abnormal or excessive fat accumulation that may impair health considered to be preventable disease we should know the contributing factors that lead to be able to reduce its burden and prevented effectively there is will knowing risk factors like age, gender, reduce physical activities, increase food intake, socio-economic factors, education, marital status and medical conditions and medication on the other hand there is risk factor that are not well known such as shift work. the health complication of irregular shift working hours and night shift rise many epidemiological studies to investigate the association between health impact and shift work as result of wide number of researches that have been published and found link connected shift work with many health problem such as various type of cancer like breast cancer, prostate, endometrial and colon cancer, shift work have been classified recently as probable carcinogenic by international agency for research on cancer. Night shift schedules contributed to cardiovascular and coronary heart disease, gastrointestinal disease, increase the risk of type II diabetes. Dose shift work consider as risk factor for overweight and obesity. In this review we will answer to this question through several studies hopefully will give new dimension to scientists and public health worker for preventing overweight and obesity, which eventually reduce the burden of health cost and reduce several kinds of diseases.

Keywords: Body mass index; Body weight; Overweight; Obesisty; Health behavior; Night work; Occupation; Shift work; Rotating shift work; Physical activity; Food intake; Sleep duration; Work environment; Health consequences