Through four studies conducted in Canada, Germany and the United States, the up-held opinion of exercising being capable of giving a much healthier and better life, has been confirmed.

Surprisingly the first study, based on data from the Nurses' Health Study in the United States, found that women who are more physically active in the middle-aged were possibly "successful survivors".

Researchers at the Harvard School of Public Health, Brigham and Women's Hospital and Harvard Medical School found that women who exercised reduced their chances of having chronic diseases, heart surgery or any physical, cognitive or mental impairment during their old age.

Another study revealed that that adults aged 55 and older who engaged in moderate or high physical activity were less likely suffer less during the old age.

And the last study concluded that women aged 65 or older who took part in an exercise program for 18 months had denser bones.

The authors of that study said "Since the American population is aging rapidly and nearly a quarter of Americans do not engage in any leisure-time activity, our findings appear to support guideline regarding physical activity to promote health among older people".