The 2008 Nutrition and Health Barometer, a national cross-sectional survey carried out by the French National Institute for Prevention and Health Education, has enabled to study the physical activity of elderly people aged 55 to 75 years. The amount of physical activity they do is not so different from that of younger adults. They have a better knowledge of the recommendations than the latter, but this does not necessarily fit their practice. This highlights the need to improve also the environment.