I have been weight training and exercising for years but I never am able to get lean. My muscle mass always increases, but I wind up looking bigger. I love to challenge my body, but as I grow I just look heavy. How can I loose the puffiness and show my physique better? I've had 3 kids and am in my mid 30's. I work out very hard but I feel like I'm wasting time because the scale just keeps going up and my measurements aren't changing. Please help!