狐狸啊,你在做什么上

《我的名字叫金三顺》的编剧再度出马,《狐狸啊,你在做什么》不仅刷新了韩剧姐弟恋的年龄差纪录,情节与对话也调侃暧昧了许多。更难能可贵的是,几乎每一集的收视成绩都保持着不错水平,千正明与高贤贞这对原本看似不搭的拍档,也随之成为了观众心中的天作之合。编剧、演员,服装、配乐……每一个都很用心,令每个看过电视剧的人,都完全为它吸引。     

现代女子中长跑运动员的训练问题

一、比赛的特点为了创造优异成绩,挖掘运动员的最大潜力应当充分考虑到运动员速度与距离变化的关系。中长运动员的成绩预测是依据对全程的开始、中间和结束时的速度而提出的。但无论何时,速度又取决于步长和步频。因此,中长跑运动员的任务是保持每段距离所特有的步长和步频。掌握运动员的比赛指标的方法是根据对世界记录的预测和搜集与记录速度高度相关的步长与步频的统计资料来决定的。尤其重要的是,要通过计算和分析找出训练中负荷跑的最合理的安排。现在经过计算,分析得知,女子中长跑运动员要进入世界记录水平,必须达     

Athens 2004: the pollution climate and athletic performance

Athens sits in a basin approximately 450 km2 in area, surrounded by mountains and open sea. Anthropogenic emissions in conjunction with the topographical and meteorological conditions can result in high air pollution within the city. The pollutants of concern for athletes competing in Athens 2004 appear to be nitrogen dioxide (NO2), ozone and particulate (PM10) pollution. Exposure to elevated ozone concentrations has been reported to give rise to symptoms that include cough, chest pain, difficulty in breathing, headache, eye irritation and a decrease in forced expiratory volume in one second. All of these effects are likely to impact upon performance, and several studies of cyclists suggest this to be the case. In contrast, the impact of ambient concentrations of NO2 appears to be negligible on normal activities, but at high exercise intensities the impact remains unclear. The use of currently available information and models to predict the effect of ozone and other pollutants on elite athletes is problematical, since such models are based upon significantly lower ventilation rates than those achieved by some elite athletes. In addition, it is already known that the response to ozone can vary somewhat between individuals. Since the individuals who will be competing in Athens are physiologically very different to the participants in most published studies, it is difficult to predict individual responses. There is some evidence to indicate that adaptation to the adverse health and performance effects of ozone can occur, so that performance is partially recovered on re-exposure. The adaptation is not seen in all studies and appears to be dependent on several factors, including the initial sensitivity of the individual to ozone. Antioxidant supplementation has also been shown in some studies to partially ameliorate the adverse effects of ozone by counteracting the oxidative stress mechanism associated with this pollutant. Whether this transfers to performance enhancement per se remains unclear at present. Additional research is required to gain a sound understanding of the effects of a complex mixed air pollution exposure on the pulmonary function and performance of athletes exercising at high work intensities.     

The stress of travel

International travel is an essential part of the life of elite athletes, both for competition and training. It is also becoming increasingly common among recreational sportspersons. Long-distance travel is associated with a group of transient negative effects, collectively referred to as 'travel fatigue', which result from anxiety about the journey, the change to an individual's daily routine, and dehydration due to time spent in the dry air of the aircraft cabin. Travel fatigue lasts for only a day or so, but for those who fly across several time zones, there are also the longer-lasting difficulties associated with 'jet lag'. The problems of jet lag can last for over a week if the flight crosses 10 time zones or more, and they can reduce performance and the motivation to train effectively. Knowledge of the properties of the body clock enables the cause of the difficulties to be understood (an unadjusted body clock), and forms the basis of using light in the new time zone to promote adjustment of the body clock. Sleep loss and its effects are important components of jet lag, and attempts to promote sleep by the use of melatonin and other hypnotics are also relevant. Sleep loss is also found in those who undertake challenges that involve long periods where the normal consolidated sleep of 8 h length is not possible. Advice on sleep regimens in such circumstances is given.