Okay so I've taken a look at the preview ep 1-2 of the anime, is her count of her walking distance or her mother's? Here it says her mother's, but the anime says hers.
Her food advice is the opposite of ketosis for weight loss, you want to reduce your meals per day so you can give time for your insulin levels to dip low enough to go into ketosis.
@Eviltwin illustrator's probably not paid enough to depict the 3500 in the background, you'll notice the wide shots are fairly flat, there's no sense of scale.