I came down from 15 to 10 percent (female) in two months. I did by swimming 500m every morning, doing 60-120 minutes on the stairmaster every night, and eatting between 500-1000 calories a day (carbs: fruits and vegetables only, some nuts, egg whites, no meat). however, i had insomnia from iron deficiency (i would sleep at 12 and beat my 6am alarm clock by oh two hours), vitamin c deficiency (bursting red blood veins) and i was later diagnosed for an eating disorder. im not saying my way was good or bad. just being honest about what happened. as far as the ED goes, i also have a mother who was bulimic in high school and a history (i had a bout of this about 8 years ago) so its not necessarily that working out causes eating disorders. I dunno just teling you what worked for me.