I will say that I enjoy things now that I'm doing more things than just cycling. I understand that you're not as good in all three things individually unless you're training for one thing ('scuse me, it's late!). I guess I like that. Expectations make me uncomfortable and I like the fact that in a tri, my run time will be slower than if I was just doing a normal 5k or 10k. Maybe I can surprise people and actually look somewhat strong when it's not expected
I also think that my body likes it better when I'm not doing one thing. My cycling gets better when I run but then again I'm not an elite or competitive cyclist. Swimming is a good cross-training sport. Running, also, seems to do more in a shorter period of time.
I'm a total novice too but I think as long as you space out your different sports and don't inundate ill-prepared muscles (ie do a hardcore cycling workout and then a hardcore running workout in consecutive days) you won't do any harm. Then again, I know nothing![]()