this post was submitted on 17 Feb 2024
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The fasting is the part that actually affects your weight.
Running for half an hour burns about 400 calories. 1 hour of running, 800. 3 runs a week can burn a day's worth of calories. Don't understate the impact exercise has.
While exercise will have some impact the vast majority of weight is controlled by what you eat not what you do. Also calories are not burnt in a simple one to one equation. Different types of calories are processed definitely in the body. Sugar turns to fat, but the same amount of calories in bacon, or carrots, or bread, are all different, and your body will use them differently. The less processed a food is, the harder it is for your body to extract those calories, so measuring calories from what it says on yh packet is not the best guide.
Sorry, rambling.
Tl;Dr - Exercise for fitness, eat for fitness.
Definitely do both if you need to, but don't under estimate exercise. I went from 10.5st to 9.5st just doing couch to 5km and then continuing to run 5km 3 times a week, no other dietary changes.