▲英国医生建议起床45分钟后喝咖啡比较适当。
许多人习惯一起床就喝咖啡,希望能藉此提振精神。不过,睡眠专家指出,起床后立刻喝咖啡可能并非最佳选择。
根据外媒报导,英国医生黛博拉(Deborah
Lee)表示,早晨醒来时,体内的皮质醇(Cortisol)处于一天中最高的状态,这是能提升警觉性和专注力、调节新陈代谢以及调控免疫系统的荷尔蒙。她指出,这时马上喝咖啡反而会引起反效果,长期下来,也可能导致人体对咖啡因产生耐受性,需要更高的剂量才能达到相同效果。
另外,黛博拉也指出,皮质醇会随着睡眠周期变动,在起床后30至45分钟内为最高峰,然后缓慢下降。这也解释了为何人们在早晨通常感到精力充沛,而到了晚上则会感到疲倦。考虑到皮质醇浓度的变化,她建议喝咖啡的黄金时间是起床后至少45分钟,此时皮质醇已经逐步降低,最佳饮用时间落在早上的中后段,通常随着皮质醇下降,精神也开始萎靡,但是如果下午太晚喝咖啡,也会影响睡眠。举例来说,对于早上约7点起床的人来说,最好等到上午10点或中午才享用第一杯咖啡。这段时间,身体和大脑都已经觉得需要提神的补充,而咖啡因也能发挥最佳效果。
然而,犹他州睡眠专家、行为科学家崔克塞尔(Wendy
Troxel)对此持不同看法。她表示,没有科学证据显示喝咖啡的时间会产生不同的警觉性。因此,她建议每个人都应该尝试找出最适合自己的方式,有些人可能会选择起床后先喝水,再喝咖啡;而对其他人来说,早晨立即享用一杯咖啡可能更合适。
-->
`,
"script":[{"type":"text/javascript","src":"//widgets.outbrain.com/outbrain.js","async":"async"}]
}
, "gg_rightside": {
"html":`
`,
"script":[{"type":"text/javascript","src":"//widgets.outbrain.com/outbrain.js","async":"async"}]
}
, "gg_duturandom": {
"html":`
`,
"script":[]
}
, "gg_square": {
"html":`
`,
"script":[]
}
, "gg_topbanner": {
"html":`
`,
"script":[]
}
, "gg_middlesquare": {
"html":`
`,
"script":[]
}
, "gg_dutu": {
"html":`
`,
"script":[]
}
, "gg_botline": {
"html":``,
"script":[]
}
, "gg_dututop": {
"html":`
`,
"script":[]
}
, "gg_shipintop": {
"html":`
`,
"script":[]
}
, "gg_inContent": {
"html":`
`,
"script":[]
}
, "gg_shipinrandom": {
"html":``,
"script":[]
}
, "gg_sideSticky": {
"html":`
`,
"script":[]
}
, "gg_bottombanner": {
"html":`
`,
"script":[{"type":"text/javascript","src":"//widgets.outbrain.com/outbrain.js","async":"async"}]
}
, "gg_marquee": {
"html":`
`,
"script":[]
}
}
const adEnv={
"gg_header": {
"html":``,
"script":[{"type":"text/javascript","exec":` var googletag = googletag || {}; googletag.cmd = googletag.cmd || []; var pbjs = pbjs || {}; pbjs.que = pbjs.que || []; `},{"type":"text/javascript","src":"https://adncdnend.azureedge.net/adn-hb/adn.wnx2.js","async":""},{"type":"text/javascript","src":"https://adncdnend.azureedge.net/adn-video/WenxuecityPlayer.js","async":"async"}]
}
}
const wxcEnv = {
"base":{
"exe":[],
"src":[
{"src": "/news/js/recommendednews.js","defer":"true"},
{"src":"/js/wxcFunc.js","defer":"true"}
]
},
"func":{
"exe":[
//展示评论
'function showMoreComments(){let n = 1;for(let i=0;i
2){dom.hide();}}$("#showallcomment").show();$("#showlesscomment").hide();};',
],
"src":[
//图片,搜索,QR code
{"src": "/news/js/view.js?v=05132024"},
//计数器
{"src":"//count.wenxuecity.com/service/count/script/do.php?type=news&id=241835&n=0&out=jsval","defer":"true"},
]
}
}
function wxcCode(){
wxcEnv.base.exe.forEach(x=>{
let tag = buildAdcode(x);
document.head.append(tag);
})
wxcEnv.base.src.forEach(src => {
let tag = buildSrc(src)
document.head.append(tag);
});
wxcEnv.func.exe.forEach(x=>{
let tag = buildAdcode(x);
document.body.append(tag);
})
wxcEnv.func.src.forEach(src => {
let tag = buildSrc(src)
document.body.append(tag);
});
}
function adcode(){
let adkey = Object.keys(ads);
adkey.forEach(x=>{
let code = ads[x].html;
let div = document.getElementById(x);
if(div)div.innerHTML = code;
ads[x].script.forEach(s=>{
if(Object.keys(s).indexOf('src')===-1){
let tag = buildAdcode(s.exec);
document.body.append(tag);
}else{
let tag = buildSrc(s);
document.body.append(tag);
}
})
})
}
function baseCode(){
let baseKeys = Object.keys(adEnv);
baseKeys.forEach(x=>{
adEnv[x].script.forEach(s=>{
if(Object.keys(s).indexOf('src')===-1){
let tag = buildAdcode(s.exec);
document.head.append(tag);
}else{
let tag = buildSrc(s);
document.head.append(tag);
}
})
})
}
function buildAdcode(script){
let tag = document.createElement('script');
tag.innerHTML = script;
return tag;
}
function buildSrc(obj){
let keys = Object.keys(obj);
let tag = document.createElement("script");
keys.forEach(key=>{
tag.setAttribute(key, obj[key]);
})
return tag ;
}