Michelle Obama was nervous about her weight as her 40th birthday approached . Women 's metabolisms slow in the premenopausal period because of hormone deficiency . Since March 2011 , she 's lost more than 100 pounds . Weight loss and eating a balanced diet is important to stay healthy after 40 .
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 .