Effect of Body Weight & Physical Activity on Life Expectancy (image) NIH/National Cancer Institute Share Print E-Mail Caption This bar graph displays years of life loss at various body weights and levels of activity. A study by the National Cancer Institute found that physical activity increased life expectancy, regardless of body weight. Credit National Cancer Institute Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.