Everyone knows sleep matters. But as surfers, we’ve all been there: Early dawn patrol. Late-night swell check. Bad sleep… and you still try to train—or paddle out anyway. The real question isn’t “Is sleep important?” It’s how much does one bad night actually hurt your performance—and does it change what  you should train? Let’s break it down. What Actually Happens When You Don’t Sleep Enough? A large meta-analysis by Craven et al.  looked at 69 studies  and 227 performance ou