人到中年,大腹便便。几乎所有的人,一到人生旅途的中间,仿佛一夜之间,体重就显著增加,最明显的是身体的中间,即使是那些可以令人羡慕地大吃大喝而不怕增加分量的天生瘦子,这时候似乎不可避免地也长出了“啤酒肚”“将军肚”“游泳圈”“备用胎”……里面装着的是沉甸甸的脂肪。人之所以会长胖,根本原因是摄入的能量多于消耗的能量,多余的能量就转化成脂肪储存起来。而人到了中年,身体发生了变化,代谢率自然地缓慢下来,使得身体的能量消耗减少。另一个变化是,从大约30岁起,人的肌肉量开始丧失。肌肉量丧 Middle-aged people, potbellied. Almost all people, in the middle of their journey to life, seem to have gained weight overnight, most notably in the middle of their bodies, even those who are eager to eat and drink with no fear of adding weight, It seems inevitable at this time also grow out of the “belly” “belly ” “swim ring ” “spare tire ” which is filled with heavy fat. The reason why people will gain weight, the fundamental reason is that the intake of energy more than the energy consumed, the excess energy is converted into fat stored up. And middle-aged people, the body has changed, the natural metabolic rate slowed down, making the body’s energy consumption reduced. Another change is that from around the age of 30, people’s muscle mass begins to lose. Loss of muscle mass