From Medscape this week:

Effect of Exercise on Bone Mineral Density and Lean Mass in
Postmenopausal Women
Med Sci Sports Exerc 38(7) 2006
http://mp.medscape.com/cgi-bin1/DM/y/m7bX0Jgw360Dz10Hoit0Fv

High-Intensity Physical Activity Reduces Cardiovascular Risk in Children
In a cross-sectional study, high- vs low-intensity physical activity
resulted in improved cardiovascular fitness and body fat in children.
Medscape Medical News 2006
http://mp.medscape.com/cgi-bin1/DM/y/m7b20Jgw360Dyz0Hoht0FU

Relationships of Activity and Sugar Drink Intake on Fat Mass
Development in Youth
Findings from this study of male and females assessed during childhood
and adolescence for a median of 5 years lend support to the idea that
increasing physical activity in male youths aids in the control of fat
mass development.
Med Sci Sports Exerc 38(7) 2006
http://mp.medscape.com/cgi-bin1/DM/y/m7ck0Jgw360F8N0Hoiy0Fl

well wishes,
kate