一 | 目前正值“三伏天”的中伏阶段。“三伏天”是一年中气温高、湿度大、暑热气息最浓的时段。“出汗排毒”、“夏练三伏”、绿豆汤当水喝……这些常见的所谓养生之道，真的健康养生吗？“夏练三伏”“出汗排毒”真的养生吗？俗话说“冬练三九、夏练三伏”，很多人喜欢在三伏天加大运动量，认为出汗越多，祛湿减肥效果越好。

二 | 然而，人体真正的排毒核心器官是肝脏和肾脏，而非皮肤。

三 | 出汗过多非但不能排毒，反而会对身体造成损伤。

四 | A video of Manchester United boss Erik ten Hag launching an X-rated tirade against members of the club's squad is going viral on social media.,Ten Hag's rant came during United's recent 3-1 victory over Crystal Palace after he appeared unhappy with his players' play in the friendly clash.,Anthony Martial, Marcus Rashford, and Jadon Sancho were the scorers for the former Premier League champions as they continued their fine run in practice matches ahead of the official kickstart of the next season.,The Dutch manager, however, was still not satisfied with the display of his side.,As David De Gea struck the ball deep into the other half of the pitch, Ten Hag was seen screaming at the United goalkeeper: "What the f*** are you doing?",Erik ten Hag screaming "WHAT THE F**K ARE YOU DOING?"This man won't settle for average. Ruthless!!! #mufcpic.twitter.com/xifRpHOj8W— UtdFaithfuls (@UtdFaithfuls) July 19, 2022,Fans on Twitter though praised him for his approach as they backed him to return the club to its glory days.,"Erik ten Hag screaming “WHAT THE F**K ARE YOU DOING?” at DDG. This Man Takes No Prisoners," a Red Devils supporter wrote on the micro-blogging website.,"It may be pre-season, but Erik Ten Hag demands perfection," another claimed.,"Erik ten Hag screaming “WHAT THE F**K ARE YOU DOING?” at Manchester United players. If they had it easy with the previous managers, they definitely aren’t now," a third posted on Twitter.,Coming back to United's recent record, the once mighty side finished sixth in the Premier League table last season and got demoted to the Europa League after failing to qualify for the 2022-23 UEFA Champions League.,Notably, United last won a trophy in 2017 - a Europa League title against Ajax, a club formerly coached by Ten Hag.。中国中医科学院广安门医院急诊科主任医师齐文升：事实上，大量流汗易造成脱水，汗液还会带走大量钠、钾等电解质，如果电解质失衡，可出现眩晕、呕吐、恶心、肌肉痉挛、抽筋等不同程度的症状。

五 | 更值得警惕的是，出汗过多，血液黏稠，容易诱发心脑血管疾病；头晕、出汗也可能是中暑、心梗、脑梗的先兆症状，一定要注意识别和预防。“夏练三伏”强调的是持之以恒的锻炼精神，不是让在最热的三伏天拼命练，高温高湿环境下剧烈运动，产热大于散热，核心体温快速上升，可能诱发肌细胞破裂，严重时可致肾衰竭。中国中医科学院广安门医院呼吸科副主任医师王毅：三伏天锻炼要掌握方法，不能盲目，建议选择清晨或傍晚进行慢走、太极拳、八段锦等低中强度项目，每次20至30分钟，以微微汗出、能正常说话、无胸闷气短为宜。运动前后多次少量饮水，切忌一次性暴饮，尤其要避免大量喝冰水，以免刺激血管骤然收缩。绿豆汤当水喝？并不是人人适宜高温天气下，绿豆汤成为很多人解暑的标配，不少人觉得绿豆汤天然无害，可以拿来当水喝。然而，大量饮用绿豆汤并非人人适宜。中国中医科学院广安门医院急诊科主任医师齐文升：绿豆性凉，容易损伤阳气，脾胃虚寒的人喝太多绿豆汤可能会出现腹泻、腹痛，甚至诱发胃部不适。

六 | 绿豆本身含有中等量的嘌呤，煮汤后嘌呤会进入汤中，尤其是浓稠的底部汤液嘌呤含量较高。

七 | 老人和孩子的消化系统相对脆弱，过量饮用可能引起腹胀、消化不良。医务人员建议，健康成年人夏季饮用绿豆汤，每日总量宜控制在500毫升以内，每周饮用2到3次即可；老人、儿童、孕妇和消化功能偏弱人群，脾胃虚寒、关节冷痛、经期痛经的人群不宜大量或长期饮用。冬病夏治 “三伏贴”不是“万能贴”三伏天是很多人眼中“冬病夏治”的黄金期，尤其“三伏贴”特别受欢迎。

八 | 但医务人员提醒，“三伏贴”可不是“万能贴”。

九 | 如果本身有血液系统疾病、身体正在感冒发热，或者属于阴虚火旺的体质，都不建议贴。如果最近经常口干咽痛、心烦易怒、手心脚心发热，说明体内有虚火，也不适合贴敷。凡是皮肤有伤口、溃疡、破损或者感染的部位，这些部位是绝对不能贴药的。三伏贴的保留时间也有讲究。成人一般贴一到三小时，贴敷之后，皮肤微微发热、有温热感是正常的。