Muscle is your metabolic furnace—every
pound of muscle burns about 50 extra
calories a day, at rest. After age 30 you
lose about half a pound
of muscle every
year due to the aging process, being
more sedentary, and
hormonal changes.
By the time you reach 40, you will have
lost on average five pounds of muscle and
will be burning 250 fewer calories every
day. It takes 3,500 extra calories to gain a
pound of fat. If you're burning 250 fewer
calories every day you'll accumulate an
extra pound of body fat every two weeks
compared to the younger you at age 30.
