From MilitaryTimes’s PT365:

Numerous fitness institutions espouse the virtues of minimalism, with CrossFit being one of the more famous examples. I also believe in the mantra of “less is more.” Below are three exercises you can do with only an Olympic bar and a weight plate. Choose the plate that best suits your ability (10 pounds and 25 pounds are good starting points). These exercises engage multiple muscle chains. All three are done with the plate and bar attached. You can create many more exercises with a bar and a single plate. Just use your imagination