09/05/2026
If you are losing muscle after 35, those changes may happen without a significant change in body weight. That is because body weight tells only part of the story.
Muscle, fat, water, bone and other tissues all contribute to the same number. When lean muscle mass decreases while body fat increases, the scale may look stable even as your strength, energy, metabolism and body composition shift.
The scale may stay the same while muscle, strength and body composition quietly change. Learn what can contribute and what to evaluate next.