Loss of stamina

[ilmyar]

A few days ago i participated as a fighter in shotokan karate championship.
i was about to win suddenly i felt that i am tired and i was unable to move much so the opponent had chance to make points and he did.
at last the points were equal then we had to fight for 30 sec. more that was very bad to hear so my stemina made me loss the fight!
fight duration was 2 min 30 sec.
have u any cure plz

[jw8725]

um might sound obvious but do more cardio vascular workout?

[ilmyar]

thanks for suggestion.