II. Physiology
-
Lean Body Mass
- Lean mass decreases by as much as 0.7 lb or 0.3 kg per year, starting after age 20-30 years
- Fat mass
- Fat mass increases until age 65 to 70 years that offsets losses in Lean Body Mass
- Total body weight
- Weight increases until it peaks at age 60 years old
- Weight decreases 0.2 to 0.4 lb (0.1 to 0.2 kg) per year after age 70 years old