I get body scans done every month at my gym. Last month, it said I was at 26.8% body fat and 65.3 pounds of skeletal muscle mass. This month, it said I am at 23.7% body fat and 68.1 pounds of muscle mass. During this time I remained the same weight. I am a little unsure of the accuracy of these machines. Is this big of a change possible in one month??