Good fitness exercises for men without barbells?

Sounds like you mean primarily upper-body, so I’ll skip walking, running, etc. Push-ups (with your feet up the stairs if you are already pumped), pull-ups, sit-ups or crunchers, etc., are some obvious starters. Check out some military exercise manuals, they provide a lot options for “unassisted” exercise.

run in the morning. the mornin is the best time to run because its refreshing