锻炼有助于向大脑输送含有氧气的新鲜血液,所以,人们在锻炼后会感觉神清气爽、心情舒畅。尤其是有氧锻炼和力量训练,都能增加脑源性神经营养因子的含量,让人感到很快乐。但如果人停止锻炼两周或以上,大脑分泌的“快乐激素”多巴胺就会降低。因此,人容易感到焦虑和疲劳,就更不愿意锻炼,从而形成恶性循环,导致心情不佳。 Exercise helps to deliver fresh blood containing oxygen to the brain, so people feel refreshed and relaxed after exercising. Especially aerobic exercise and strength training, can increase brain-derived neurotrophic factor content, people feel very happy. But if one stops exercising for two weeks or more, the brain secretes a “happy hormone” dopamine. As a result, people are more likely to feel anxiety and fatigue and are less likely to exercise, resulting in a vicious circle that leads to poor mood.