1. Department of Health. At least five a week: evidence on the impact of physical activity and its relationship to health. London: Department of Health; 2004.
2. Physical activity patterns and aerobic fitness among prepubescents;Armstrong;Eur Phys Educ Rev,1996
3. Gender differences in physical activity and physical fitness in young children in Crete;Manios;J Sports Med Phys Fitness,1999
4. Physical activity for children and youth;Pangrazi;JOPARD,1996
5. Sport and Recreation New Zealand. SPARC facts: results of the New Zealand sport and physical activity surveys (1997–2001). Wellington: SPARC Policy Research Team; 2003.