Originally Posted by MetalClydesdale

Headwinds do have an effect on overall speed, but for me they've always done more damage to my morale than my legs. There's something incredibly frustrating about fighting to maintain a decent speed on a flat road, and it ratchets up to inhuman levels of frustration when you have to fight to get going downhill.

Unixpro:
Remember what they say; there are no tailwinds, it's either a headwind, or you're having a good day.