I mean, yeah. Anyone who posts their daily, uninteresting activities to social media are probably narcissists.

If you’re accomplishing something, doing something you’re proud of, or sharing a special experience, that’s a different motivation entirely. But “Here’s a daily shot of my greasy muscles while I do a few reps” is narcissism. “I’m really proud of my six months of progress” or “am I doing this exercise correctly?” is not narcissism.