there are many

It depends on the nature of work and social class 9f the worker. White collar workers, for example computer programmers, work from home or at the office (don't ask why it's 'from', it just is), and may be referred to as teleworkers. Manual workers, for example in garment manufacturing, work at home or at the factory, and may be referred to as outworkers.

The opposite of "telecommuting" or "working remotely" (i.e. tele work) isn't "working out". "To work out" means "to do exercise", usually in a focused and structured way. There isn't one single verb which is the opposite of telecommuting. As Annie mentioned, you would say, "I work in an office" or "I work at X company."

Did you mean teleworking for "tele work Vs"?

Hello, this might be different for other people, but for me I would say: 'I work from home.' Or 'I work at ... (company name) / I work in ... (position / place) Best wishes, Annie