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Another unit used to measure levels
另一個衡量運動強度的單位是MET
of activity is the MET. MET stands for
MET的意思是代謝當量任務
metabolic equivalent task. All living being
所有生物都需要能量
require energy to support the basic functions
來維持人體的基本機能
of the body hence there is a constant energy cost
所以這些代謝過程都要
associated with these metabolic processes.
持續不斷地消耗能量
This is called the resting metabolic rate.
這叫做靜息代謝率
Physical activity adds to the energy costs of
除了人體保持靜止需要的能量
the body beyond those required to maintain
運動會消耗人體更多的能量
the body at rest. Energy expenditure varies
能量消耗隨著運動種類
with type of activity and intensity and the MET
和劇烈程度的不同而變化
measures this. Many studies have been done
MET正是衡量能量消耗多少的單位
to determine energy cost of different activities
很多研究發現，通過檢測氧氣的消耗
by monitoring the oxygen consumed and
和計算運動的平均耗氧量
calculating the average oxygen it takes
可以確切得知不同運動的
to do that activity. Comparing that average oxygen
能量消耗是多少，通過比較
intake to resting oxygen uptake is how METs
平均耗氧量和靜息耗氧量而得出的MET值
are determined. One MET is the energy expended
一個MET是靜止時消耗的能量
at rest. Two METs designates the energy expended
兩個MET指的是靜止時
twice that at rest and so on. The higher the MET
消耗能量的2倍 MET值越高
the more intense the activity.
運動就越劇烈
The chart gives examples of activities
這個圖標提供了各種運動
and their associated METs. Very light activities
和它們的MET值，非常輕微運動
such as standing, reading, talking on the telephone,
例如站立，閱讀，打電話
studying, sitting in class and note taking all have
學習，坐在教室上課，記筆記等
a MET from 1.3 to 1.8. Light activities have
MET值在1.3到1.8之間
a MET of 2. Activities in this category
輕度運動的MET值是2
are playing a musical instrument, gardening,
輕微運動包括彈奏樂器，做園藝
light office work such as filing, walking
整理文件等輕度辦公室工作
at a slow pace and light use of hand tools.
慢走，以及手動工具的少量使用
Moderately vigorous activities have
中度劇烈運動的MET值是
a MET of 3.5 to 4 and include such activities
3.4到4，包括舉重
such as weight lifting, leisurely kayaking, walking
休閑皮艇運動，在辦公室中行走
in an office and golfing without carrying the clubs.
不攜帶球棒打高爾夫球等
Vigorous activities have METS from 6 to 16
劇烈運動的MET值在6到16之間
and include things from slow jogging at
包括消耗6個MET值的
a 13 minute mile with a MET of 6
13分鐘慢跑，和消耗16個MET值的
to running a 6 minute mile with a MET of 16.
6分鐘慢跑
Physical activity and obesity are closely related.
運動和肥胖有著密切的關系
Individuals who are inactive tend
不愛運動的人
to have a higher percent body fat
肥胖的概率更高
and may be obese. Obesity has been found
可能導致過度肥胖，研究發現
to be a significant risk factor for cancer.
肥胖是癌癥的重要誘因
The American Cancer Society estimated
2005年，美國癌癥研究協會估測
in 2005 that 90,000 Americans die annually
每年有90000美國人
from cancer primarily because of being overweight.
因為過度肥胖而死于癌癥
This accounted for 14% of cancer in men
上述人群占男性癌癥患者的14%
and 20% of cancer in women. In women
占女性癌癥患者的20%
obesity leads to higher risks of breast, uterine,
女性過度肥胖容易導致乳腺癌，子宮癌
cervical, pancreatic, esophageal, renal and
子宮頸癌，胰腺癌，食道癌，腎癌
gall bladder cancers. And in men obesity
以及膽囊癌的高發病率，男性過度肥胖
is linked to higher risk for liver, pancreatic,
會帶來肝癌，胰腺癌，結腸癌
colorectal, stomach and gall bladder cancers.
胃癌以及膽囊癌的高發病率
