I feel like I am living proof of that. I've been out of the exercise groove for four months now. I am not completely inactive (a few hikes, some skiing, and daily 2 - 3 mile dog walks) but I am not doing a ton of purposeful cardio or strength. I want to. I will. I am just not right now for a variety of stupid and painful reasons (depressed, stressed, too much to do for the house and my dissertation, etc, blah).
And yet, I can control excess fat on my body with my diet. If I am not training my body to be a strong, muscled machine of efficiency, I at least don't have to punish it by throwing a layer or two of fat on it!
Note: I DID actually get some purposeful exercise yesterday, I used the rowing machine I bought and my shoulders hurt today as proof :)
But despite this lack of exercise, I've been RIGHT on track with eating well. It shows. I'm 126 lbs today.
So, though I would share what I am eating in a given day. This was yesterday:
Breakfast: 2 eggs cooked in olive oil and 3 strips of lean turkey bacon
Lunch: Gluten-free cranberry bar from my local co-op and So Delicious almond milk yogurt
Dinner: Homemade chili (buffalo meat, tomatoes, peppers, onions, and mushrooms only) with a slice of gluten free bread
Snacks: half a roasted sweet potato and almonds
This all came out to the mid-1700s for calories for the day.
So, moral of the story for me: even if I manage to convince myself I have excuses for not exercising, I have no excuses for not eating right. I always make time to eat, haha, and I can put good things in when I do that. As I get back into exercising (especially strength training which I miss), it will be so much easier if I don't have extra pounds on my to deal with when I do.