"Health is wealth", one who has good health can enjoy the pleasures of life. Healthy people make a healthy nation. Good health is essential for human welfare and sustained economic and social welfare. Traditionally good health is viewed merely as the absence of disease. Generally one who has strong built and muscular body is considered to be healthy. World Health Organization (WHO1946) definition of health is "Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity"