Yes. Cardio plays with your neurotransmitters. Specially dopamine. That is the reason I do cardio when I start feeling lethargic.
I got home from work at 3:00 pm. Ate tuna and whey shake. 30 minutes later. Im SOOO tired i couldnt keep my eyes open, but i decided to do my cardio to get it over with..HIIT cardio btw. After Im done......Im completely awake!!! is this normal?
Yes. Cardio plays with your neurotransmitters. Specially dopamine. That is the reason I do cardio when I start feeling lethargic.
Of COURSE; you've just sped up your system. Later on, you'll be tired again. Common sense..
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