Passage 2
Questions 6 to 10 are based on the following passage.
Many changes take place when you get old.The worst is decreasing of muscle mass.
Although there is not much decline in your muscles between ages 20 and 40,after age 40 there can be a decline of 1%to 2%per year in lean body mass and 1.5%to 5%per year in strength.The loss of muscle mass is related to both a reduced number of muscle fibers(纤维)and a reduction in fiber size.
This change in muscle mass leads to poor coordination(协调).The brain and nervous system can't work together as well as before.Everything from hitting a golf ball to keeping a coffee cup steady as you walk across a room will become slower.In addition,the“eye”side of hand-eye coordination -plays a role.Eye diseases are much more common in older adults,whose aging starts with mild difficulty in seeing.
Then the question arises:how to combat all these?There is a myth in our society that it is fine to do less exercise the older you get.The truth is just the opposite!As you age,it becomes more important to exercise regularly-perhaps even increasing the amount of time you spend exercising to compensate for bodily changes in hormones(荷尔蒙)and other factors that you cannot control.The good news is that participating in exercises to improve strength and coordination can help people of any age.
When it comes to what exercise gives the older people great benefits,squat(深蹲)might be on the top of the list.As we know,age-related strength loss tends to be increased in the lower body compared to the upper body.Weakness in the lower body also tends to affect more functional daily activities and can lead to an increased risk of falls as we get older.So primary attention needs to be given to strengthening muscles in the lower body.
The squat is a highly recommended lower limb exercise for everybody,working multiple muscles n a very functional way.There are a number of different variations of the squat depending on your current level.It can be started as a sit to stand from a chair or bench,a wall squat or a body weight squat.These can then be progressed with added load,such as holding water bottles or dumbbells.
问题7:Some difficulty in seeing things occurs as