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李汉伟： 2025-10-04 00:24:25

working out only on the weekends or otherwise compressing your total physical activity into one or two prolonged runs or a single vigorous basketball or soccer game each week could lessen your risks of dying prematurely almost as effectively as more frequent, shorter workouts spread throughout the week, according to an interesting new study of the weekend warrior phenomenon. as most of us have heard by now, the standard recommendation about how much exercise we should complete each week for health purposes is 150 minutes of moderate or 75 minutes of vigorous physical activity. moderate exercise consists of activities like brisk walking or easy cycling that raise heart rates while still allowing us to talk to training partners, and vigorous activities are those like running, cycling, and many team sports, including basketball and soccer, that raise heart rates into a zone where speaking is difficult. meeting these guidelines is associated with a substantially reduced risk of developing a wide range of diseases and dying too young. the guidelines also suggest that, for practical purposes, people consider breaking the 150 minutes into five moderate sessions each week or a comparable number of shorter, more vigorous workouts. but many people apparently do not have the time or inclination to exercise five times per week. about a third of american adults engage in zero weekly exercise and others pack their workouts into one or two sessions on saturday or sunday, when they have more free time. there has been little information, though, about whether the weekend warrior pattern of exercise lowers the risk for premature death as effectively as more frequent and generally shorter workouts. so for the new study, which was published on monday in jama internal medicine, researchers at loughborough university in england and other institutions decided to delve into the exercise routines of tens of thousands of men and women already participating in the health survey for england and the scottish health survey. the researchers zeroed in on data from 63, 591 men and women who had provided detailed descriptions of their workout patterns when they first entered the study at least 15 years before, telling the survey questioners how many minutes they had exercised each week during the past month, what kinds of exercise they had undertaken, and how many times per week they had worked out. the researchers used that data to categorize the men and women into a variety of groups. those who never exercised were defined, unsurprisingly, as inactive, while those who worked out but did not meet the standard guidelines were considered insufficiently active. those who did exercise for the full 150 gentle or 75 vigorous weekly minutes were labeled sufficiently active. this last group was then subdivided into those who spread their physical activity over at least three sessions and those who jammed it into one or two workouts, presumably on weekends (although the actual days were not specified). interestingly, these weekend warriors were mostly male, almost half exercised only once per week, and an overwhelming majority, almost 90 percent, reported that their exercise occurred during vigorous sports like competitive running and cycling or team sports like soccer. finally, the researchers crosschecked their participants against death registries, to determine mortality in the intervening years since each person had joined the original survey. it turned out that exercise, in any amount, had substantially lessened the risk that someone would die from any cause, including heart disease and cancer. men and women who exercised, even if they did not meet the guideline recommendations, were about 29 percent less likely to die prematurely than people who never worked out. those who met the recommendations gained a slight edge in longevity, being about 30 percent less likely to have died than people who never exercised. this advantage remained about the same whether people worked out three or more times during the week or jammed all of their activity into a session or two. “reductions in risk were similar in the weekend warriors and the regularly active,” says gary o’donovan, a research associate at loughborough university who led the study. of course, this study was observational so it can’t tell us whether exercise actually caused people to live longer but only that the two are associated. it also raises questions it cannot answer, including whether weekend warriors might be missing out on other potential health gains from exercise. frequent exercise is generally thought to be better than fewer workouts at, for instance, preventing and controlling type 2 diabetes, says hannah arem, an epidemiologist at george washington university who wrote a commentary to accompany the new study. weekend warriors also could be losing aerobic fitness between workouts, since endurance capacity typically declines after a or layoff. so weekend warriors might be rebuilding and maintaining but not augmenting their baseline fitness from one week to the next. and they are likely to face a higher risk of injuries than people who exercise more often. but even with those caveats, the good news from this study, dr. o’donovan says, is that whatever type of activity you can fit into your schedule appears to be better for your longevity than no activity at all.

梅尔·耐多： 2025-10-04 00:24:11

新春伊始，受新冠疫情等因素影响已阻隔三年的两岸正常交流，显示松动迹象；虽不乏挑战，两岸吁“融”之声更清晰恳切。今年全国两会，两岸多方均关注大陆方面将释出哪些新信息、如何实质推进两岸融合。

titikarn： 2025-10-04 00:23:42

　　目前，各地正组织开展“四清四无”大排查。“四清”是指清江、清湖、清船、清网，“四无”是指无捕捞船舶、无捕捞网具、无捕捞渔民、无捕捞生产。12月16日起，部际协调机制还将组织禁捕退捕工作大督查和“四清四无”情况水上大排查，确保各项目标任务按期高质量完成。

迈克尔·雷德格瑞夫： 2025-10-04 00:24:06

有34张仓单进入交割月，基差为-55

黎兵： 2025-10-04 00:23:59

""it's much smarter if you can get levels as you go."" mr armes warned that developers still had to learn how to tell stories effectively in the medium. ""in some ways we are trying to forget about the hardware, go in the opposite direction. we have been very bad at letting technology design our creativity. ""what we have to do as a company is start ignoring the technology and learning our craft in telling stories."" mr gardner agreed: ""we can thrown more polygons around and have better ai but if it doesn't make for a better game then that's not very useful."" developers will certainly have the tools with the new machines, but how they employ them is still to be decided.

孙莹丁： 2025-10-04 00:24:18

even when funding for studies is available, problems are common, as julia belluz tells us in her vox piece titled i asked 8 researchers why the science of nutrition is so messy. here’s what they said. take the women’s health initiative, which featured one of the biggest and most expensive nutrition studies ever done. as part of the study, women were randomly assigned to two groups: one was told to eat a regular diet and the other a low-fat diet. they were then supposed to follow the diet for years. the problem? when researchers collected their data, it was clear that no one did what they were told. the two groups basically had followed similar diets. “they spent billions of dollars,” says walter willett, a harvard physician and nutrition researcher, “and they never tested their hypothesis.”