Information
Musculoskeletal system 
- Alterations in joint surfaces, ligaments, tendons, and connective tissues
- Decreased bone density
- Decreased number and size of muscle fibers
- Atrophy of muscle tissue; replaced with fibrous tissue
Respiratory system
- Loss of elastic lung recoil
- Increased airway resistance
- Reduced vital capacity
- Decreased chest wall compliance
- Decreased gas exchange
Cardiovascular system
- Increased blood pressure
- Decreased stroke volume
- Decreased cardiac reserve (ability to respond to stress)
Integumentary system
- Decreased subcutaneous adipose tissue
- Decreased elasticity of connective tissue
- Loss of sweat and sebaceous glands
Central nervous system
- Reduced nerve conduction speed
- Decreased rate and magnitude of reflex response
- Decreased sensory activity
- Decreased myoneural transmission
- Decreased muscle contraction speed
- Increased postural sway (contributes to balance problems)
[Outline]