Michelle Obama was nervous about her weight as her 40th birthday approached . Women 's metabolisms slow in the premenopausal period because of hormone deficiency . Weight loss and eating a balanced diet is important to stay healthy after 40 .
Michelle Jackson got nervous about her weight as her 40th birthday approached . Women 's metabolisms slow in the premenopausal years because of hormone changes . Weight training and eating a balanced diet is important to stay healthy after 40 .