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How This Doctor Lost 176 Pounds
Ali Zentner

WHO:Dr. Ali Zentner, internal medicine and obesity doctor

AGE: 42

CITY: Vancouver

By The Numbers: 326 at my heaviest, and currently 150. Height: 5'4''

The Weight Gain: I struggled with my weight ever since I was a kid. When I was nine years old, my mother took me to see a dietitian. I weighed 120 pounds, and the dietitian told me that if I stayed the same weight for the rest of my life, I’d be fine.

Food always had control over me — I would think about it all the time. I would argue I’d been dieting for decades. I started a variety of programs though high school and my weight fluctuated, and in university, it really started to climb. By the time I was in medical school, I was almost 200 pounds. When I finished I was 260 and when I finished my residency I was 300.

Make no mistake, as a physician who studies this disease [obesity], I definitely know I had a genetic disposition. How we relate to food has a really complex physiology, but you can’t discount the environment I engaged in. I was a really sedentary person, specifically through residency and medical school. I was definitely someone who did not eat properly, which was fascinating because I knew what to eat.

The Final Straw: The only story I can really remember is that I was in residency and I bought a ticket for one of those home lotteries and won an elliptical trainer. I’d love to tell you I took the elliptical home and put it in my room and boom! But it was probably months before I got on it for five minutes and I thought I was going to die. And then I thought "I’ll just do five minutes again tomorrow." Within a few weeks I started to write down what I was eating, so I started to make gradual changes.

I didn't lose 176 pounds in three years — the bulk of my weight I lost was in the first four years (120 pounds) and the remaining 50 or so has been since then.

Story Continues Below Check out more of our inspiring weight loss stories:

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The Plan Of Attack: Keep a food diary and exercise every single day. Also, you should weigh yourself at least once a week — I do it to see where I am. However, the scale is not a very accurate measurement, but that being said, it’s a really good place to start.

I also have rules. I try not to eat out more than once a week, but I try to make it a really nice time. I’m militant about food when I can be — I think of it like a disease.

The Food Element: I try to avoid refined carbohydrates, in fact at all costs. My diet consists primarily of healthy protein and lots of vegetables, probably seven to eight servings a day and three pieces of fruit.

But I’m not scared of fat — I think my diet is probably more of a Mediterranean based diet. I eat bread at a restaurant when it’s quality, and typically on Sundays when I’m not working, I go to this a cafe and have a macaron.

The Exercise Factor: My story isn't typical, not everybody loses 175 pounds and keeps it off. Not everybody goes from being really physically unwell to being a marathon runner. But slowly, five minutes became 10, 10 became 20, and within six months I was doing an hour a day. I also took up swimming and running.

The Current Day-To-Day: I bike to work and back every day -— an hour total with occasional loops through the park. I'm also training for a marathon.

There are days when I’m working late, and when I don’t have the chance to go for the run, I add an extra 20 minutes on the bike. I've made activity a part of my lifestyle now.

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