Jackie noticed an increase in appetite after she started weight training. since she did not change her eating habits, her body fat began to drop. why did this happen? a. weight training slows the metabolism in order to allow muscles to grow and repair. this causes fat loss. b.even though jackie says she did not change her eating habits, she must have consumed fewer calories, causing her weight to drop. c.when jackie is exercising she does not have time to eat. this, combined with the calories burned during exercise, must have been enough to cause her body fat to drop. d.as muscle mass increases, so does metabolism. a higher metabolism burns more fat.