In so much as 99% of fitness influencers are culpable for internet-worm-borne eating disorders, they really have an outrageously criminal omission in failing to share how to fuel oneself, both outside of the workout and within! If you’re doing a hard effort, you need carbohydrates, electrolytes, and water! If you’re doing a long effort, you need same. It scales by time, not really by effort though there can be some modulation. If you get in the habit of fueling every time, you will not be so wiped after a workout! It shouldn’t make you want to lay down and die after. Should NOT.