I just came across a new supplement that has helped me soo much with my cardio that I wanted to get the word out for everyone to try. Kona Endurance’s CitraBeta Shot is a ridiculously intense energy supplement that helped me reach past my threshold for endurance and continue to move ahead. I do alot of cycling and running and when I take this supplement I feel like I can do cardio all day. Check it out @ Supplement Central.