Yesterday I did my first cardio routine that is fast twitch muscle tissue specific. This morning I was so tired! I had a hard time waking up, no amount of coffee seemed to help. Even when I started my workout I felt like I was moving in slow motion. I think my fatigue is because of the cycling tabata I did yesterday. That workout really tore me up! I'm really excited about having started fast twitch muscle tissue building type cardio. I think it's the last missing piece for me to become a great Olympic weightlifter.