We’ve all been there: Your alarm wakes you with a jolt, reminding you that you planned to hit that 6 a.m. spin class. Except dinner with friends went a little late last night, and you are so. Incredibly. Tired. But if you skip your morning workout, you won’t have any other time to do it. Which is worse? Skipping your workout, or losing that hour of sleep?

— Read on curiosity.com/topics/sleep-vs-exercise-which-is-more-important-curiosity