一生中最易發胖的時期大綱

Puberty

青春期

Why? Girls naturally gain weight at this stage because fat cells increase in size and number, says Dr Marilyn Glenville, nutritional expert and bestselling author of Fat Around the Middle.

爲什麼？女生在這一階段會自然增重，因爲脂肪細胞的尺寸和數量會在這一階段增大，營養專家和暢銷書《腹部脂肪》（Fat Around the Middle）的作者瑪莉琳·格倫威爾博士說道。

Puberty creates changes in body shape and periods don't start until there is enough body fat in place. teenagers also need more calories than adults to supply the energy they require for growth and shouldn't be alarmed about putting on weight.

青春期會帶來體型變化，直到體內有足夠的脂肪時，大姨媽纔會到來。青少年比成年人所需的熱量更多，以提供成長所需的能量。此外，青少年不應爲體重增長而煩憂。

Combat it: Don't worry. Social pressure and media images don't help but weight gain at this time is perfectly natural. Faddy and very low-calorie diets send the body into counter-productive starvation mode, reducing its metabolic rate and increasing its fat store, explains Dr Glenville.

如何擊敗：別擔心，社會壓力和媒體形象無濟於事，因爲青春期增重是非常自然的。格倫威爾博士解釋道，過分挑食和超低熱量的飲食會使身體進入適得其反的飢餓模式，降低新陳代謝的速率、增加脂肪的存儲。

Dr Sally Norton, an NHS weight-loss consultant surgeon and founder of , says we must lead by example. If you obsess about your weight, embark on fad diets and describe foods as good and bad, your children will copy you.

英國國民健康體系的減肥顧問外科醫生和的創始人薩莉·諾頓博士說道，我們必須以身作則。如果你癡迷於自己的體重，開始挑食，認爲食物有好有壞，那你的孩子也會模仿你。

Leaving home/ starting university

離家/上大學

Why? A culture of stress, drinking and unhealthy eating means eight in 10 students gain weight during their time at university, according to a recent survey. "The combination of being able to eat what you want, when you want, managing a budget and newfound freedom, means many young people eat a poor diet, drink too much alcohol and don't get enough sleep," explains Dr Norton.

爲什麼？近期的一項調查顯示，壓力、飲酒和不健康的飲食文化意味着十分之八的大學生會增重。"既能隨時吃自己想吃的東西、又能管理預算、還可獲得自由，這意味着很多年輕人的飲食習慣差、飲酒過多、睡眠不足，"諾頓博士說道。

Combat it: Teach your teenagers basic cooking skills before they leave home, she advises. Worryingly, a Sainsbury's survey showed that more than a third of students can't even boil an egg! "Show how it's possible to eat healthily on a budget. And encourage them to sign up to societies that involve team sports and activities during Freshers' Week."

如何擊敗：在孩子離家前，教授他們一些基本的烹飪技巧，她建議道。令人擔憂的是，塞恩斯伯裏的一項調查顯示，三分之一以上的學生甚至不會煮雞蛋！"向他們展示，如何在預算內吃得健康。鼓勵他們在新生週報名涉及團隊運動和活動的社團。"

Pregnancy

孕期

Why? The average mother-to-be puts on a perfectly normal 10kg during pregnancy "although all women are different and some gain more," adds Dr Norton. As well as the baby, placenta and amniotic fluid, that weight includes an extra two litres of blood and fat reserves for energy and breastfeeding.

爲什麼？平均而言，每位準媽媽會在孕期增重10公斤，"儘管所有的女性不盡相同，且有些女性可能會增重更多，"諾頓博士補充道。除嬰兒，胎盤和羊水外，增加的重量還包括額外的2升血液和用於提供能量和母乳餵養的儲存脂肪。