When you run an average of 35-45+ miles a week, people probably expect that you’ll lose a TON of weight. If weight loss is your primary goal, training for a marathon probably isn’t the best method. That amount of exercise will destroy calories, absolutely. However, calories are energy and energy is what you need to complete a 10-20+ mile long run–so you need to eat, and you need to eat a LOT.
I’ve never exercised this much or this consistently in my life–even before my NYC Half PR a few years ago my longest run leading up to the event was 10 miles. Not only am I running 40-ish miles a week (I’m up to 17 miles for my long run), I’m spending at least one day a week cross training. With the amount of calories I’m zapping, my body is BEGGING me to replace them. After a long run, I’ll immediately replace calories with coconut water or a smoothie before I eat my first meal of the day. On a good day, I’m hungry every couple of hours–but I typically find myself hungry again an hour after I eat. I find myself eating constantly, and needing to consume larger meals, and snack frequently in between meals. I find myself seeking out the most filling foods (which also happen to be pretty calorically dense)–beans, hummus, carbs. My appetite is a result of my body needing to replace the calories I burn working out so I can keep going. Increased activity leads to increased calorie intake leads to a relatively stable weight.
In the beginning, I shed quite a few pounds pretty easily, but now I’m evening out. I’d say overall in the last 2 months I’ve lost maybe 10 pounds. That’s not so say I don’t LOOK a lot more fit. I’m gaining muscles I’ve never seen before and I’m losing fat. But I’m not losing a TON of weight. And I didn’t expect to. I would never deprive my body of the calories and nutrients it needs to perform its best leading up to the marathon. Lately I’ve been worried about whether or not I’ve consumer enough the night before a longer run to ensure my energy level is high enough to get me through the run.
If you want to run a marathon, prepare yourself to eat a lot during training. Don’t expect to lose a ton of weight. If you do, you’re going to deny yourself what you need to perform your best. Eat when you’re hungry and make sure you’re getting enough calories. You’ll still lose a little weight and you are going to look and feel fit. Just think about all you can eat without feeling guilty, and ENJOY it. You’re going out on 3-4+ hour long runs and working out almost every day. You’re experiencing aches and pains you never thought were physically possible. You are sacrificing hours upon hours of your free time. You’re going to sleep early on Friday nights (and waking up early on weekends). You’re missing out on countless happy hours and drinks with friends. You DESERVE to eat and enjoy things you’d normally feel a little guilty about. Pasta and bread, yes please and thank you!