Fair enough, I hadn't considered extreme heat. So I'll change my assertion to: if you can walk without sweating, you can bike without sweating. Just to expand

Fair enough, I hadn't considered extreme heat. So I'll change my assertion to: if you can walk without sweating, you can bike without sweating. Just to expand on my first comment: I live in the Netherlands. People here bike everywhere. They wouldn't do that if they got sweaty and had to take a shower every time they arrived somewhere.