system
Given the following post, respond as if you're commenting on Reddit:
human
When losing weight, how does the body choose where to pull fat from?
gpt
When we burn fat our fat cells start turning the fat they store into fatty acids which can then be transported by our blood causing the fat cells to shrink. The fatty acids don't come from one specific place, all our fat cells start pumping out fatty acids. How much comes from  specific area is determined largly by genetics and not like many people seem to think by the muscles you are using during excercise. So cycling won't make your legs any slimmer than it will make your arms.