As we grow older, we begin to lose precious muscle mass and bone mineral density. (alwaysgaining.com)
If you are looking for rapid «weight» loss, you will find yourself losing precious muscle tissue instead of fat. (womenshealthandfitness.com.au)
To get rid of it, you need to eat fewer calories than you burn, but if you limit your calorie intake too much you'll start losing precious muscle as well. (fitnessandpower.com)