HHP 2200 Lecture Notes - Lecture 22: Bone Density, Bone Fracture, Vigorish
3 May 2018
School
Department
Course
Professor
Musculoskeletal Health
Osteoporosis
• Low bone mass (low bone mineral density)
• Structural deterioration of bone tissue
• Low bone strength
• Contributes to bone fracture risk hip, vertebrae, wrist
Nonmodifiable Modifiable
Age (>50 years women, >70 years men) Physical inactivity
History of fractures Tobacco use
Sex (women) Thin or underweight
Genetics Low sex hormones
Ethnicity, race (White, Asian) Nutrition (low calcium and Vitamin D intake)
(Excessive caffeine and alcohol)
Sex- males/females?
Why do more women have osteoporosis than men?
• Childhood
o Female mature sooner- males have more time to develop bone
o Boys are more active than girls
• Hormones
o Estrogen and testosterone- maintains bone mass
o Menopause- significant reduction in bone density
• Adulthood
o Males are more activity, particularly more resistance training
PA decrease risk of osteoporosis
• Physical activity
o Increase peak bone mass
o Slows decline in bone mass loss
o Reduces risk of falls
• Best time to address osteoporosis
o Childhood and adolescence- opportunity for intervention
▪ Right before puberty
o Adulthood- emphasize bone overload (higher force activity- running jumping skipping)
Mode
Impact
Resistance
Aerobic
Intensity
3.5x body weight
> 60% 1 RPM
Mod to vig
Duration
100 impacts
>30 min
30-40 min
Frequency
3x/week
3x/week
Daily
Program
>7 months
>7 months
unknown
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