A "desk job" refers to a type of work that is mainly done sitting at a desk rather than being physically active. It often involves office work like managing paperwork, using a computer, or answering phone calls. Full definition
So many of those people are at desk jobs all day instead of being able to retire and be active. (healthcentral.com)
As a general rule, people with desk jobs are seen as less of a risk than those who earn their living some other way. (carinsurancequote.net)
To put this in perspective, studies report that agricultural workers can burn up to 1,000 more calories per day than people working desk jobs (4). (healthline.com)