Inactive people should start with small amounts of physical activity and gradually increase duration, frequency and intensity over time.
缺乏活动的人在开始时应做少量的身体活动，并随时间逐步增加活动时间、频率和强度。
They may also begin to need to do more and more of the activity over time to feel the effects, and experience physical and psychological withdrawal symptoms if they can't do it.
他们也可能开始时需要在一段时间反复重复这种活动才能感觉它的效果，如果他们无法继续，就会出现戒毒那样身体上和心理上的综合反应。
A trend towards decreased physical activity levels due to the increasingly sedentary nature of many forms of recreation time, changing modes of transportation, and increasing urbanization.
由于多种形式娱乐活动越来越倾向于久坐不动、不断改变的交通模式和日益增长的城市化，造成身体活动水平下降的趋势。
Participants were asked how often they engaged in both light and intense physical activity during their leisure time. People were also asked how physically active they were at work.
接受测试人员者需回答他们在休闲时间参加轻、重体力活动的频繁程度，以及工作时的体力劳动强度。
The negative impact of screen time was not remedied by increasing a child's physical activity levels.
加强体育锻炼并不能抵消长时间面对屏幕带来的负面影响。
make physical activity part of the family’s daily routine such as designating time for family walks or playing active games together;
使身体活动成为家庭日常活动的一部分，例如指定时间供全家步行或一起开展体育活动；
"Incorporate physical activity into time with your kids because it's probably not going to happen on its own," says Berge.
“把体育活动和孩子的时间结合起来，因为这不可能在单方面发生。”Berge说。
Teens reported screen time and their level of physical activity four times per year or a total of 20 times during the five-year study.
在为期五年的调查过程中，这些青少年汇报了他们在屏幕前的时间以及体育锻炼的程度，每年4次，总共为20次。
It is appropriate to start with smaller amounts of physical activity and gradually increase duration, frequency and intensity over time.
适宜的方法是，从较小的活动量开始，然后随着时间的推移，逐渐增加持续时间、频度和强度。
Associating the privacy metadata should be a one-time-per-connection activity, unless the physical data model changes.
关联隐私元数据应该是一次只能关联一个连接，除非物理数据模型改变。
Get fit - Many volunteering opportunities, like relief work or construction, involve a lot of physical activity which will get you fit in no time.
保持体型。很多志愿活动，包括救济或建筑工作，需要大量的体力劳动，这些能够帮你快速打造更好的体型。
When we have time for leisure we tend to fill that time with physical activity or with passive TV viewing.
当我们空闲时，我们更倾向一些体力活动或者被动地看电视。
Earlier studies have found that while more time spent in front of a screen led to lower well-being, physical activity improved one's state of mind.
以前的研究发现虽然长时间看屏幕会使身体素质降低，经常锻炼却能促进身心健康。
If I increase my physical activity during the night, I may see changes in my energy patterns during this time.
如果我增加在夜间的体育锻炼，相信会有所改变。
If you want to lose weight or meet specific fitness goals, you may need to increase the time you spend on physical activity even more.
如果你想减肥或有特定的健身目标，你可能需要花更多的时间。
Parents answered a questionnaire detailing the amount of time their children spent watching TV, playing video games, reading and engaging in indoor and outdoor physical activity.
父母回答一份问卷说明他们孩子看电视，玩电子游戏，看书和进行室内室外体育活动的具体时间。
There is growing concern that not only low physical activity but probably also sitting and sedentary behaviour is an important and new health hazard of our time.
引起越来越多的担忧的不仅仅是体育锻炼时间少，久坐行为也是我们这个时代新的重大健康隐忧。
Sitting too much may increase the risk of dying prematurely, while replacing sitting time with just standing or moderate physical activity could counteract the effect.
久坐的生活习惯会提高早逝的风险，而要降低这种风险，仅仅需要多花一些时间站立或者进行一些温和的活动。
While you may not have time to get an hour-long workout in during the middle of the day, a few minutes of physical activity can improve the way you feel.
一天中，你都没有办法抽一个小时去做锻炼的时候，几分钟的身体锻炼就可以让你变得更精神。
The most common reason people give for not exercising is lack of time, but physical activity doesn't have to be performed in one long session.
导致人们不运动最通常的原因是没有时间，但每次训练不是一定需要很长时间。
The main factor that affects them to participate in physical activity is heavy housework, busy work, having no time and no interest.
家务重、工作忙、无时间或本身不喜欢是影响她们参加体育健身活动的主要因素。
Life is mans living activity itself. It is a choice of living value in a certain time and certain space in which mans physical body and spiritual consciousness combine in one harmonious unity.
生命是人的生存活动本身，它是人的物质肌体与精神意识统一在一定时间和空间中的生存价值选择活动。
At the same time, those whose physical activity increased over a five-year period — though these cases were few — showed notable increases in gray-matter volume in those same parts of their brains.
此外，在5年期间体育活动有所增加的老年人——尽管这样的例子并不多——脑部相同部位中的灰质量也显著增加了。
The effects on retention time, the rates of catheterization related complications, the patients ′ satisfaction and the influence on physical activity were compared.
比较三组患者静脉留置针留置时间、置管不良反应发生率、患者满意度及肢体活动影响。
The research on cumulative effect or influence emphasizes the correlative relation and time-space distribution of each activity but not focusing on the micro and discrete physical changing procedure.
累积影响的研究侧重于开发活动的相互关系与时空分布的研究，而不是微观具体的物理变化过程的研究。
At the same time, the relationship between the physical-chemical properties of the harden paste and the hydration age, the pozzolan activity of the fly ash in the harden paste have been discussed.
同时讨论了粉煤灰水泥硬化浆体的物理化学性能与水化时间的关系，以及硬化浆体中粉煤灰的火山灰活性。
It's exhausting, time consuming and although it counts as physical activity, housework does not improve health or help to shed those excess pounds, British researchers said.
英国研究者说，家务劳动既费时又累人，虽然也算是身体运动，却既无益于健康也无助于减除赘肉。
It's exhausting, time consuming and although it counts as physical activity, housework does not improve health or help to shed those excess pounds, British researchers said.
英国研究者说，家务劳动既费时又累人，虽然也算是身体运动，却既无益于健康也无助于减除赘肉。
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