This paper (in Greek) is written by physiotherapist Prof M. Michalopoulou, Ass Prof N Agelousis, Mrs V. Zisi, M. Ventouri, Th.Kourtessis and P. Malliou and published originally in a Greek Electronic Journal, Inquiries in Sport & Physical Education, (Vol 4 (1): 87:96, 2006). It presents physical activity levels of community-dwelling adults aged over 60 in Greece and the age and gender effects.
The abstract is available here