Morning training is harder than afternoon training. That's not opinion — it's physiology. Your body temperature is lower, glycogen is partially depleted, cortisol is peaking, and your nervous system is still booting up. A pre workout matters more at 5 AM than it does at 5 PM because the performance gap between "just woke up" and "ready to train" is wider than any other time of day. But most pre workouts are 12-15g of artificial flavoring, sweeteners, and filler — the last thing your empty stomach needs at dawn.