【英语时差8,16】下半身更容易聚集脂肪？2（在线收听）

 For many people, gaining weight as they age is an unfortunate, but unavoidable, fact of life. Some people gain it in the belly area, some pack on the pounds lower down, in the thighs. Now, not gaining weight at all is probably the best option. But if you had to choose where your extra pounds would go, picking the lower body might be the better option. Why ? Weight gain in the upper body happens when eating too much junk results in the expansion of existing fat cells. For reasons that are not entirely clear, the growth of these existing cells may trigger what’s known as metabolic disease a host of problems that disrupt metabolism, and cause all sorts of issues.