听力原文：Olga: Hi Ben! Hi Sally! Come in.Ben: Hi Olga!Sally: Hi Olga!Olga: Did you have an

听力原文：Olga: Hi Ben! Hi Sally! Come in.

Ben: Hi Olga!

Sally: Hi Olga!

Olga: Did you have any problems getting some basic information for our project on fitness assessments？

Ben: I didn't. There's plenty of information available nowadays, because so many people are interested in keeping fit.

Sally: Yes, I got some useful information we can use from websites

and Ben got some stuff from fitness centres in the city. Q21

Olga: Great! I found some things in magazines and newspapers. I Q22

think we might find the biggest problem is that we have too

much information. Anyway, let's begin. Now, a fitness assessment Q23

is a series of measurements that can help determine

physical fitness. There are several standard tests in a fitness

assessment. Depending upon the assessor, other tests may be

added to achieve a greater picture of fitness.

Sally: Or lack of it! According to my information, the main tests in

a fitness assessment evaluate body mass index, resting heart

rate and blood pressure, and aerobic fitness. Additional tests

may evaluate body composition, lung capacity, flexibility and

strength.

Ben: What exactly does the body mass index tell us about a person's fitness？

Sally: Body mass index evaluates a person in terms of their height and weight to determine total body mass. It can show if a person's body mass measurement exceeds normal limits and thus indicates that weight loss would be a good idea.

Ben: So, it's a bit inexact, then？

Olga: Yes, it is. BMI alone is usually not thought to be the best measure

of physical fitness. Someone who is very muscular may Q24

have a higher BMI than is considered normal, because muscle

weighs more. A true measurement of a body's fat content in a

fitness assessment may be better obtained through something

called hydrostatic weighing, which assesses the body's composition Q25

more exactly.

Ben: Hydrostatic weighing？ I've never heard of it.

Olga: I don't have any more information on it. We can make a note of it and look it up later. Sally, you said there were other ways of evaluating fitness？ Sally: Er ... yes. A typical fitness assessment. will also evaluate heart

rate and blood pressure. Measuring resting heart rate is important

because it allows you to figure out what the safe levels of increasing

the heart rate are during aerobic exercise. The basic

formula for measuring safe maximum heart rate is 220 minus Q26

age, minus resting heart rate. This figure is multiplied by 0.9 Q27

and the resting heart rate is added back to get the maximum

heart rate at which one can safely exercise. Olga: However, it says here that determining appropriate maximum

heart rate in a fitness assessment should also take into account

blood pressure. A person with high blood pressure should be Q28

evaluated by a physician prior to proceeding with an exercise

programme.

Ben: Definitely! Another common test in a fitness assessment is

aerobic fitness. This looks at the heart rate and oxygen rate Q29

during a moderate workout that may last five to ten minutes.

Evaluations about the ability of the blood to oxy