Does the cooling effect in swimrun let you go longer and harder?

Why does it feel like you can swimrun forever? Well, sort of. When running on that hard and long stage in the sun heating up in you wetsuit, many of us have experienced fighting with these nasty thoughts of giving up. Overheating can be really tough on your physical performance and also on your psyche. But then you hit the waterline, swim for a short distance and feel the cool water trickling …