B
Tai chi is a special kind of exercise that helps people lower their blood pressure. A study found that it works better than running or riding a bike. Tai chi is 52% better at reducing high blood pressure than regular exercise like running or swimming.
Scientists from the China Academy of Chinese Medical Sciences looked at 324 people who had slightly(略微) high blood pressure. They divided them into two groups. One group did tai chi for one hour, four times a week. The other group ran, rode bikes, or swam for the same amount of time.
After a year, the scientists saw that the people doing tai chi lowered their blood pressure by 10%. The people who exercised in other ways only lowered theirs by 6%. People all over the world practise tai chi. They do it for many reasons. It can not only keep their bodies healthy but also relax their minds. Tai chi is easy and only includes slow and gentle movements. Doing tai chi regularly can make you more flexible and stronger.
Many people have high blood pressure, but some do not know they have it. A doctor who helped with the study thinks that everyone should learn about tai chi. It is a safe exercise for people of all ages, and it can help reduce heart problems.
() 5. What is tai chi mainly known for?
A. Increasing heart rate.
B. Making people run faster.
C. Improving swimming skills.
D. Helping lower blood pressure.
() 6. For how long and how often did the tai chi group practise?
A. Two hours a week.
B. Thirty minutes every day.
C. One hour, four times a week.
D. One hour, three times a week.
() 7. What kind of movements does tai chi include?
A. Slow and gentle movements.
B. Simple and easy movements.
C. Dangerous and brave movements.
D. Strong but comfortable movements.