They are often deceptively difficult, you know.
I was riding once, it was really windy. Another time not so much. It was pretty tough there for a while.
There were no bikini women around, so I don't know, maybe it not too tough, I was pedaling though.
That pretty much describes all of my rides. We cyclists are used to the suffering.
I have horrible aerobic style...I've simply never been conditioned (like, ever) for consistent, steady output. I'm more of a sprinter. So, hilly terrain suits me better, as I can surge up the hill then coast down. There's no coasting on flats, so any flat, regardless of headwind or tailwind, is hard for me.