In a long-term study of the health of the people of in the United States, the U.S. Public Health Service documented the chances of developing heart disease among various groups in the population. Long before the any symptoms appeared, epidemiological research could identify high-risk groups.
As people age, they begin to complain more of pains in their muscles and joints. They seem to stiffen up with age, and such commonplace activities as bending over for the morning paper can make them wince.
The numbers on your scale do not indicate whether you are fit or fat. Far more significant than your total body weight is the composition of your body tissue. If a man’s fatty tissue is bigger than 14% up to 15% of his body mass, or if a woman’s is more than 20% to 22%, he or she is overweight, or more precisely, overfat.