I think it's a good tiredness no ? (^_^)
Yes personnaly if i eat not well i dont have the same vascularity, at training (pump effect) and at the day my veins are not full.
Deficit calorie are not easy .... because without training we fell like lethargic so i can't imagine with training ....
Some boxeur pro go outside running between 04 / 06 AM with empty stomach and eat after that (digestion need around 15/20% of flux blood) so it's better to eat around 3h before or eat after your training.
Arginine Base or Citruline Base HELP A LOT for your goal .... If you have the opportunity to try
Like +1