3/29 Talk about osteoporosis.

Osteoporosis is a medical condition of fragile bones caused by a decrease in bone density.

Bones become so weakened that even a minor bump could cause a fracture.

Osteoporosis is diagnosed when the T-score is -2.5 or below.

Factors associated with osteoporosis are genetics, smoking, excessive drinking, low body weight, and lack of exercise, calcium and vitamin D.

Bone mass decreases after age 35, so everyone past that age should be on guard.
* be on guard: be careful 주의하다. cf> be off guard: 무방비로

Women after menopause are particularly susceptible to osteoporosis.
* be susceptible to: ~하기 쉽다.


@ He tends to lie through his teeth.  그 친구 정말 뻔뻔하게 거짓말을 해. 


1. You have to exercise regulary to increase your bone density.
2. He was diagnosed with lung cancer.
3. Lack of sleep makes me stressed out.
4. You should be on guard when going out alone at night.