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# 11.3: Health Related Components of Physical Fitness

In many studies related to physical fitness and health, researchers have focused on exercise, as well as on the more broadly defined concept of physical activity. Physical activity is defined by the World Health Organization as any bodily movement produced by skeletal muscles that requires energy expenditure, while exercise is a form of physical activity that is planned, structured, repetitive, and performed with the goal of improving health or fitness. So, although all exercise is physical activity, not all physical activity is exercise. Although physical activity and exercise are defined concepts, the ultimate focus of the health related components of physical fitness is to provide a framework for components that are necessary for good health. They are cardiorespiratory (CR) endurance (also called aerobic endurance), flexibility, muscular strength, muscular endurance, and body composition.

Cardiorespiratory Endurance

• Aerobic endurance: The ability of the heart, blood vessels, and lungs to work together to accomplish three goals:
1. deliver oxygen to body tissues
2. deliver nutrients
3. remove waste products.
• 谎言7：没错，约翰昨晚是和我在一起。说谎原因：这就是朋友该做的事。等下我们两个还要通通气，以免穿帮。

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 Examples of Different Aerobic Physical Activities and Intensities Moderate Intensity Vigorous Intensity Only Kobe Bryant had played in more games by age 32, and did so with fewer minutes, and that's just including regular-season games. Water aerobics 中国建材行业一周大事记（4.4-4.8） Tennis (doubles) Ballroom dancing General gardening 家具卖场样品走俏 业内人士提醒谨防次品 Swimming laps Tennis (singles) Aerobic dancing 地方楼市去库存仍待时日 业内：兼并整合是趋势 Jumping rope Song “Happiness” (Mao A’Min) LED企业佛山托维陷入资金链断裂困局

## Frequency and Duration

7. Pumping Iron Could Enhance Long-Term Memory

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"As a native of Shaanxi, I found Sun played the role well. She jumps and runs wildly, just like a typical young naughty Shaanxi girl," a netizen Xuelili said.

Sixty-one percent of Chinese college students who graduated in 2014 are satisfied with their current jobs, a survey has revealed.

## Intensity

The Guidelines for adults focus on two levels of intensity: moderate-intensity activity and vigorous–intensity activity. To meet the Guidelines, adults can do either moderate-intensity or vigorous-intensity aerobic activities, or a combination of both. It takes less time to get the same benefit from vigorous-intensity activities as from moderate-intensity activities. A general rule of thumb is that 2 minutes of moderate-intensity activity counts the same as 1 minute of vigorous-intensity activity. For example, 30 minutes of moderate-intensity activity a week is roughly the same as 15 minutes of vigorous-intensity activity. A person doing moderate-intensity aerobic activity can talk, but not sing, during the activity. A person doing vigorous intensity activity cannot say more than a few words without pausing for a breath.

## Muscular Strength and Endurance

• Muscular strength: The ability of muscles to exert maximal effort.
• Muscular endurance: The ability of muscles to exert submaximal effort repetitively (contract over and over again or hold a contraction for a long time).

These kind of activities, which includes resistance training and lifting weights, causes the body's muscles to work or hold against an applied force or weight. These activities often involve relatively heavy objects, such as weights, which are lifted multiple times to train various muscle groups. Muscle-strengthening activity can also be done by using elastic bands or body weight for resistance (climbing a tree or doing push-ups, for example).

• Intensity, or how much weight or force is used relative to how much a person is able to lift;
• Frequency, or how often a person does muscle strengthening activity; and
• Repetitions, or how many times a person lifts a weight (analogous to duration for aerobic activity). Repetitions play a key role in determining if an activity is improving muscular strength or endurance. Low repetitions with more weight will focus more on muscular strength, while high repetitions with less weight will focus more on muscular endurance. The effects of muscle-strengthening activity are limited to the muscles doing the work. It's important to work all the major muscle groups of the body: the legs, hips, back, abdomen, chest, shoulders, and arms.

If Dwyane Wade lost 30 pounds of muscle, you wouldn't be able to tell him apart from the high school version of himself.
The companies that have tried — and so far failed — to create a sustained ETF boom in Asia say the need for wholesale reform suggests the market will be defined by a protracted effort to convince both the regulators and customers to redraw the scenery.
While the S&P 500 is on track to conclude another stellar year of gains, those who sought to beat the index are poised to finish with a more dubious distinction. According to Lipper, 85% of all active stock mutual fund managers had been trailing their benchmarks through the end of November. In a typical year, there are nearly twice as many managers outperforming, with only around two thirds of funds struggling to catch up. Lipper says this is the worst year for active managers relative to the market in three decades.

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《善地》
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Other Chinese companies that filed a large number of patents included ZTE, Alibaba, Xiaomi, BYD and Haier, all of which are rapidly expanding into Europe.
《我无法忘记那天晚上和他在一起时发生的事》(‘I Could Not Forget What Happened to Me That Night With Him’)
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vt. 保卫
Shapley made early theoretical inroads into the subject, using game theory to analyze different matching methods in the 1950s and 1960s. Together with US economist David Gale, he developed a mathematical formula for how 10 men and 10 women could be coupled in a way so that no one would benefit from trading partners. While that may have had little impact on marriages and divorces, the algorithm they developed has been used to better understand many different markets.

Christine "Lady Bird" MacPherson is a high school senior from the "wrong side of the tracks." She longs for adventure, sophistication, and opportunity, but finds none of that in her Sacramento Catholic high school. Lady Bird follows the title character's senior year in high school, including her first romance, her participation in the school play, and most importantly, her applying for college.

celebrity

## Flexibility

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The latest government figures were a big jump from data in mid-December, when1,200 people were said to have left or are seeking to leave to battle alongside jihadists.

WORST GREETING
The thing about the Mavericks is that this is not at all how Dirk should go out. That team has been so solid his entire career. To have a busted season now is painful. Maybe he ought to have joined Kobe, KG, and Big Fundamental last summer.
1.Actuary
Over the summer, the bubble in the Chinese stock markets burst, wiping out trillions of dollars in valuation. Despite extensive efforts to contain the plunge, the Shanghai Composite Index had declined 43 percent on Aug. 26 since its peak on June 12.
We will work to ensure that our people have access to equitable and quality education.
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Human bodies are frail, easily damaged packages full of parts that can never fully come back once lost. Luckily, researchers worldwide are working on replacing every bit of the body to make us all cyborgs.
This post is in partnership with Time. The article below was originally published at Time.com

## Body composition

Many people think, "If I work extra hard, I'm going to get noticed." But it doesn't work that way. If you want to advance, some of the responsibility falls on you to toot your own horn. Make sure your supervisor and your supervisor's supervisor are well of aware of what you're contributing.
Average years of work experience: 10 in Philadelphia, 12 in San Francisco

2016年的欧洲杯足球赛，俄罗斯与英国球迷因其粗鲁及流氓行为一直占据新闻头条。

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9.消防员